Cialis online.

Common uses 

Amaryl is a sulfonylurea used to treat diabetes mellitus (sugar diabetes). 

 

Before using 

Additional monitoring of your dose or condition may be needed if you are taking chloramphenicol, dexfenfluramine, fenfluramine, gemfibrozil, monoamine oxidase inhibitors (maois), oxyphenbutazone, phenylbutazone, sulfa antibiotics, certain “water pills” (diuretics such as hydrochlorothiazide), or medicine for high blood pressure or heart conditions (ace inhibitors). Inform your doctor of any other medical conditions, allergies, pregnancy, or breast-feeding. 

Use of Amaryl is not recommended if you have a history of acidosis. Contact your doctor or pharmacist if you have any questions or concerns about taking Amaryl. 

 

Directions 

Follow the directions for using Amaryl provided by your doctor. Take Amaryl with breakfast or your first main meal. 

Store Amaryl at room temperature in a tightly-closed container, away from heat and light. If you miss a dose of this medicine, take it as soon as possible. If it is almost time for your next dose, skip the missed dose and go back to your regular dosing schedule. Do not take 2 doses at once. 

 

Cautions 

Before you begin taking any new medicine, either prescription or over-the-counter, check with your doctor or pharmacist. Do not exceed the recommended dose without checking with your doctor. 

 

Follow the dietary plan provided by your doctor. Amaryl may cause increased sensitivity to the sun. Avoid exposure to the sun, sunlamps, or tanning booths until you know how you react to this medicine. Use a sunscreen or protective clothing if you must be outside for a prolonged period. Do not drink alcohol without first discussing it with your doctor. 

 

Amaryl may cause hypoglycemia (low blood sugar). Signs of hypoglycemia include an increased heart rate, headache, sweating, tremor, increased hunger, changes in vision, nervousness, or tiredness. Discuss with your doctor or nurse how to handle hypoglycemic reactions. 

 

If you plan on becoming pregnant, discuss with your doctor the benefits and risks of using Amaryl during pregnancy. It is unknown if Amaryl is excreted in breast milk. Do not breast-feed while taking Amaryl. 

 

Possible side effects 

Side effects, that may go away during treatment, include dizziness, weakness, headache, or nausea. If they continue or are bothersome, check with your doctor. If you notice other effects not listed above, contact your doctor, nurse, or pharmacist. 

 

If you take too much 

If overdose is suspected, contact your local poison control center or emergency room immediately. Symptoms of overdose may include lightheadedness, sweating, rapid pulse, tremor, confusion, seizures, and loss of consciousness.

Zithromax is an antibiotic related to erythromycin. It is prescribed for adults to treat certain mild to moderate skin infections; upper and lower respiratory tract infections, including pharyngitis (strep throat), tonsillitis, worsening of chronic obstructive pulmonary disease, and pneumonia; sexually transmitted infections of the cervix or urinary tract; and genital ulcer disease in men. In children, Zithromax is used to treat middle ear infection, pneumonia, tonsillitis, and strep throat.

There is a possibility of rare but very serious reactions to Zithromax, including angioedema (swelling of the face, lips, and neck that impedes speaking, swallowing, and breathing), anaphylaxis (a violent, even fatal allergic reaction), and serious skin diseases. If you develop these symptoms, stop taking Zithromax and call your doctor immediately.

Take Zithromax capsules at least 1 hour before or 2 hours after a meal. Zithromax tablets and oral suspension can be taken with or without food. Do not take any form with an antacid that contains aluminum or magnesium, such as Di-Gel, Gelusil, Maalox, and others. If you are using single-dose packets of Zithromax powder for oral suspension, mix the entire contents of each packet with 2 ounces of water, drink immediately, then add an additional 2 ounces of water, mix again, and drink to make sure you’ve taken the entire dose. When giving the pediatric suspension, shake the bottle thoroughly before each use and measure the dose with the supplied calibrated dropper. Use the pediatric suspension within 10 days and throw out any that remains. Be sure to take all the drug prescribed. If you stop taking Zithromax too soon, some germs may survive and the illness may return. –If you miss a dose… Take the forgotten dose as soon as you remember. If you don’t remember until the next day, skip the dose and go back to your regular schedule. Never try to “catch up” by doubling the dose. –Storage instructions… Zithromax should be stored at room temperature.

Side effects cannot be anticipated. If any develop or change in intensity, inform your doctor as soon as possible. Only your doctor can determine if it is safe for you to continue taking Zithromax. More common side effects may include: Abdominal pain, diarrhea or loose stools, nausea or vomiting Less common side effects may include: Blood in the stools, chest pain, dizziness, drowsiness, fatigue, gas, headache, heart palpitations, indigestion, itching, jaundice (yellowing of the skin and the whites of the eyes), kidney infection, light sensitivity, rash, severe allergic reaction including swelling (as in hives), vaginal inflammation, vertigo, yeast infection Other uncommon side effects sometimes seen in children include: Agitation, constipation, cough, facial swelling, feeling of illness, fever, fungal infection, insomnia, loss of appetite, nervousness, overactivity, pinkeye, runny nose, shortness of breath, sore throat, stomach inflammation, sweating The single large dose of Zithromax that is prescribed to treat sexually transmitted infection of the cervix or urinary tract is more likely to cause stomach and bowel side effects than the smaller doses prescribed for a skin or respiratory tract infection.

 

Do not take Zithromax if you have ever had an allergic reaction to it or to similar antibiotics such as erythromycin (E.E.S., PCE, and others).

Like certain other antibiotics, Zithromax may cause a potentially life-threatening form of diarrhea called pseudomembranous colitis. Pseudomembranous colitis may clear up spontaneously when the drug is stopped; if it doesn’t, hospital treatment may be required. If you develop diarrhea, check with your doctor immediately. If you have a liver problem, your doctor should monitor you very carefully while you are taking Zithromax.

Imitrex is used to treat migraine headache attacks once they occur. It is not effective in preventing migraines. Imitrex is not to be used for other types of headaches. 

 

The following information is intended to supplement, not substitute for, the expertise and judgment of your physician, pharmacist or other healthcare professional. It should not be construed to indicate that use of the drug is safe, appropriate, or effective for you. Consult your healthcare professional before using this drug.  

 

Imitrex is used to treat migraine headache attacks once they occur. It is not effective in preventing migraines. Imitrex is not to be used for other types of headaches.  

 

One dose is taken by mouth at the first signs of a migraine attack. If you must take a second dose, do so exactly as instructed by your doctor. Do not take more than 200mg in a 24 hour period. Tablets are to be swallowed whole with a glass of water. Do not crush or chew them.  

 

Imitrex may initially cause flushing, dizziness, weakness, nausea, drowsiness, stiffness, or feelings of tingling, heat, fatigue. If any of these effects continue or become bothersome, inform your doctor. In the unlikely event you have an allergic reaction to this drug, seek immediate medical attention. Symptoms of an allergic reaction include: rash, itching, swelling, dizziness, trouble breathing. If you notice other effects not listed above, contact your doctor or pharmacist.  

 

Tell your doctor if you have: heart disease, coronary artery disease, high blood pressure, stroke, kidney disease, liver disease, allergies (especially drug allergies). There have been rare reports of those with sulfa drug allergies having allergic reactions to sumatriptan. Consult your doctor or pharmacist. Since Imitrex may cause drowsiness, use caution operating machinery or engaging in activities requiring alertness and avoid alcohol because it may increase drowsiness/dizziness effects. The manufacturer does not recommend use of sumatriptan in the elderly, because they may be more sensitive to its side effects. Sumatriptan should be used during pregnancy only when clearly needed. Discuss the risks and benefits with your doctor. Imitrex is excreted into breast milk. The effects on nursing infants are unknown at this time. Consult your doctor before breast-feeding. 

 

Tell your doctor of all over-the-counter and prescription medication you take, especially of: ergotamine- containing medication, all headache drugs, MAO inhibitors (e.g., furazolidone, linezolid, phenelzine, selegiline, tranylcypromine). Do not take MAO inhibitors with sumatriptan or use sumatriptan within 2 weeks of stopping use of MAO inhibitors. Do not take any ergotamine-containing medication and sumatriptan within 24 hours of each other. Also, report the use of all antidepressants or any medications used for weight control. If you are unsure about the types of medications you take, ask your care provider or pharmacist. It is recommended to avoid consumption of alcohol while taking Imitrex. Do not start or stop any medicine without doctor or pharmacist approval.  

 

If overdose is suspected, contact your local poison control center or emergency room immediately. Symptoms of overdose may include tremor, chest pain, slowed breathing, and seizures.  

 

Imitrex is used to relieve a migraine attack in progress. It is not effective in preventing migraine attacks.  

 

Take Imitrex only when a migraine attack occurs as directed. This is not taken routinely. Never “double-up” the dose.

Fosamax is indicated for treatment and prevention of osteoporosis in postmenopausal women. For the treatment of osteoporosis, Fosamax increases bone mass and reduces the incidence of fractures, including those of the hip and spine. It is also indicated for the prevention of osteoporosis, treatment to increase bone mass in men with osteoporosis, treatment of glucocorticoid. It is used to treat induced osteoporosis in men and women receiving glucocorticoids in a daily dosage equivalent to 7.5 mg or greater of prednisone and who have low bone mineral density, treatment of Paget’s disease of bone in men and women.

Fosamax comes as a tablet to take by mouth. It should be taken once a day in the morning on an empty stomach. Fosamax should be taken with a full glass (6-8 ounces) of plain water. Wait at least 30 minutes after taking Fosamax before you eat, drink, or take other medications. Do not take Fosamax with mineral water, coffee, orange juice, milk, or other dairy products. Do not suck or chew the tablet; swallow the tablet whole. Do not lie down for at least 30 minutes after taking Fosamax. Standing or sitting upright helps you get the full dose and decreases heartburn or the risk of injury to your esophagus.

Before taking Fosamax, tell your doctor if you have a problem swallowing, such as a narrowing of the esophagus; have esophageal ulcers or an esophageal disease; have a condition that causes low levels of calcium in the body; have kidney disease; have stomach ulcers or other stomach or digestive problems; or are unable to stand or sit upright for at least 30 minutes. You may not be able to take Fosamax, or you may require a dosage adjustment or special monitoring during treatment if you have any of the conditions listed above. Fosamax is in the FDA pregnancy category C. This means that it is not known whether Fosamax will be harmful to an unborn baby. Do not take Fosamax without first talking to your doctor if you are pregnant or could become pregnant during treatment. It is not known whether Fosamax passes into breast milk. Do not take Fosamax without first talking to your doctor if you are breast-feeding a baby.

If you take Fosamax every day and you miss a dose, skip that dose and take the next regularly scheduled dose the following day. Missing one dose will not affect your treatment. Do not take two tablets at the same time. If you take a Fosamax once a week and you miss a dose, take the missed dose on the morning after you remember. Do not take two tablets on the same day. Return to taking one tablet once a week, as originally scheduled on your chosen day.

Stop taking Fosamax if you experience any of the following serious side effects: an allergic reaction (difficulty breathing; closing of the throat; swelling of the lips, tongue, or face; or hives); Seek emergency or talk to your doctor if you have difficulty or pain when swallowing; chest pain; pain or burning under the ribs or in the back; or new or worsening heartburn. Other, less serious side effects may be more likely to occur. Continue to take Fosamax and talk to your doctor if you experience abdominal discomfort; stomach upset, nausea, vomiting, diarrhea, or constipation; headache; muscle, bone, or joint soreness or aches; eye pain; a rash; or an altered sense of taste. Side effects other than those listed here may also occur. Talk to your doctor about any side effect that seems unusual or that is especially bothersome.

Lipitor is used with diet changes (restriction of cholesterol and fat intake) to reduce the amount of cholesterol and certain fatty substances in your blood. Accumulation of cholesterol and fats along the walls of your arteries (a process known as atherosclerosis) decreases blood flow and, therefore, the oxygen supply to your heart, brain, and other parts of your body. Lowering your blood level of cholesterol and fats may help to prevent heart disease, angina (Chest pain), strokes, and heart attacks. 

Lipitor comes as a tablet to take it orally. It is usually taken once a day with or without food. To help you remember to take Lipitor, take it around the same time every day. Your doctor may start you on a low dose of Lipitor and gradually increase your dose. Continue to take Lipitor even if you feel well. Do not stop taking Lipitor without talking to your doctor. Eat a low-cholesterol, low-fat diet.

Do not take Lipitor without first talking to your doctor if you have liver disease. Before taking Lipitor, tell your doctor if you have a chronic muscular disease, require major surgery, or have a blood disorder. You may not be able to take Lipitor, or you may require a dosage adjustment or special monitoring during treatment if you have any of the conditions listed above. Lipitor is in the FDA pregnancy category X. This means that Lipitor is known to cause birth defects if it is taken during pregnancy. Do not take Lipitor if you are pregnant or could become pregnant during treatment. It is not known whether Lipitor passes into breast milk. Do not take this medication without first talking to your doctor if you are breast-feeding a baby.  

Take the missed dose as soon as you remember. However, if it is almost time for the next regularly scheduled dose, skip the missed dose and take the next one as directed. Do not take a double dose of this medication unless otherwise directed by your doctor.  

Keep this medication in the container it came in, tightly closed, and out of reach of children. Store it at room temperature and away from excess heat and moisture (not in the bathroom). Throw away any medication that is outdated or no longer needed. Talk to your pharmacist about the proper disposal of your medication. 

Seek emergency medical attention if an overdose is suspected. The symptoms of an Lipitor overdose are not known.

Alcohol and Lipitor can both be damaging to the liver. Alcohol should be used only in moderation. Discuss the use of alcohol with your doctor so that the potential for liver problems can be determined. Grapefruit and grapefruit juice may interact with Lipitor. The interaction could lead to potentially dangerous effects.

Cialis is used to treat erectile dysfunction (impotence; inability to get or keep an erection) in men. Cialis is in a class of medications called phosphodiesterase (PDE) inhibitors. It works by increasing blood flow to the penis during sexual stimulation. This increased blood flow can cause an erection. Cialis does not cure erectile dysfunction or increase sexual desire. Cialis does not prevent pregnancy or the spread of sexually transmitted diseases such as human immunodeficiency virus (HIV). 

Cialis comes as a tablet to take by mouth. It is usually taken with or without food before sexual activity. Your doctor will help you decide the best time for you to take Cialis before sexual activity. Cialis should not be taken more often than once every 24 hours. If you have certain health conditions or are taking certain medications, your doctor may tell you to take Cialis less often. Follow the directions on your prescription label carefully, and ask your doctor or pharmacist to explain any part you do not understand. Take Cialis exactly as directed. Do not take more or less of it or take it more often than prescribed by your doctor.  

Your doctor will probably start you on an average dose of Cialis and increase or decrease your dose depending on your response to the medication. Tell your doctor if Cialis is not working well or if you are experiencing side effects.  

This medication may be prescribed for other uses; ask your doctor or pharmacist for more information. 

Tell your doctor and pharmacist if you are allergic to Cialis or any other medications. do not take Cialis if you are taking alpha blockers such as alfuzosin (Uroxatral), doxazosin (Cardura), prazosin (Minipress), and terazosin (Hytrin). However, you may take Cialis if you are taking an alpha blocker called tamsulosin (Flomax) at a dose of 0.4 mg daily. Also do not take Cialis if you are taking or have recently taken nitrates such as isosorbide dinitrate (Isordril, Sorbitrate), isosorbide mononitrate (Imdur, ISMO), and nitroglycerin (Nitro-BID, Nitro-Dur, Nitroquick, Nitrostat, others). Nitrates come as tablets, sublingual (under the tongue) tablets, sprays, patches, pastes, and ointments. Ask your doctor if you are not sure if any of your medications contain nitrates.

Tell your doctor and pharmacist what other prescription and nonprescription medications, vitamins, nutritional supplements, and herbal products you are taking. Be sure to mention any of the following: antifungals such as fluconazole (Diflucan), itraconazole (Sporanox), ketoconazole (Nizoral); carbamazepine (Tegretol); cimetidine (Tagamet); clarithromycin (Biaxin); cyclosporine (Neoral, Sandimmune); danazol (Danocrine); delavirdine (Rescriptor); dexamethasone (Decadron); diltiazem (Cardizem, Dilacor, Tiazac); erythromycin (E.E.S., E-Mycin, Erythrocin); ethosuximide (Zarontin); fluoxetine (Prozac, Sarafem); fluvoxamine (Luvox); HIV protease inhibitors such as indinavir (Crixivan), nelfinavir (Viracept), and ritonavir (Norvir); isoniazid (INH, Nydrazid); medications for high blood pressure; metronidazole (Flagyl); nefazodone (Serzone);other medications or treatments for erectile dysfunction; phenobarbital (Luminal, Solfoton); phenytoin (Dilantin); rifabutin (Mycobutin); rifampin (Rifadin, Rimactane); troleandomycin (TAO), verapamil (Calan, Covera, Isoptin, Verelan), and zafirlukast (Accolate). Your doctor may need to change the doses of your medications or monitor you carefully for side effects.

Tell your doctor if you have or have ever had an erection that lasted more than 4 hours; a condition that affects the shape of the penis such as angulation, cavernosal fibrosis, or Peyronie’s disease; high or low blood pressure; irregular heartbeat; a heart attack; angina (chest pain); a stroke; ulcers in the stomach or intestine; a bleeding disorder; blood cell problems such as sickle cell anemia (a disease of the red blood cells), multiple myeloma (cancer of the plasma cells), or leukemia (cancer of the white blood cells); and liver, kidney, or heart disease. Also tell your doctor if you or any of your family members have or have ever had an eye disease such as retinitis pigmentosa. Tell your doctor if you have ever been advised by a health care professional to avoid sexual activity for medical reasons or if you have ever experienced chest pain during sexual activity. you should know that tadalafil is only for use in males. Women should not take tadalafil, especially if they are or could become pregnant or are breast-feeding. If a pregnant woman takes tadalafil, she should call her doctor. if you are having surgery, including dental surgery, tell the doctor or dentist that you are taking tadalafil. ask your doctor about the safe use of alcoholic beverages while you are taking tadalafil. Alcohol can make the side effects from tadalafil worse. Your doctor will tell you how much alcohol you may drink while you are taking this medication.

You should know that sexual activity may be a strain on your heart, especially if you have heart disease. If you have chest pain during sexual activity, call your doctor immediately and avoid sexual activity until your doctor tells you otherwise.

Tell all your health care providers that you are taking tadalafil. If you ever need emergency medical treatment for a heart problem, the health care providers who treat you will need to know when you last took tadalafil.

Two chemicals are produced by the male body whilst sexually aroused – Cyclic GMP which causes the muscles in the arterial wall of the penis to relax allowing blood to flow in and phosphodiesterase type 5 (PDE-5) which decreases erections. Kamagra contains an ingredient called Sildenafil. Sildenafil is a PDE-5 inhibitor. Whilst active Kamagra causes a vigorous build up of Cyclic GMP causing the penis to stay erect. It must be noted that sexual simulation is required in order for Kamagra to become effective. It is recommended that no more than one 100mg tablet is taken in any 24 hr period. 

Under normal circumstances, side effects are mild and can include upset stomach, headache and facial flushing. Other possible, less common side effects are sensitivity to light and a bluish / blurred vision. If experiencing chest pains, nausea or dizziness during sex, seek immediate medical advice. 

Kamagra must be used under a doctors supervision. It is strongly recommended that you seek medical advice (all instances) to establish if your heart is healthy enough for sexual activity. Most importantly Kamagra should never be taken if you take any medicines that contain nitrates. Nitrates are commonly contained in drugs for the treatment of Angina. Examples of these are Nitroglycerin, Isosorbide Mononitrate and Isosorbide Dinitrate. Nitrates can also be found in recreational drugs such as Amyl Nitrate (known as Poppers). If you are unsure what nitrates are or need to establish if any medicines you are taking contain nitrates consult your doctor. Taking Kamagra with any medication containing nitrates can cause blood pressure to drop to an unsafe level. Possible effects can be dizziness, heart attack or stroke. If you have ever suffered from any of the following conditions inform your doctor before taking Kamagra. 

Your doctor can then inform you if it is safe to take Kamagra tablets, and if so, the appropriate dose. All Kamagra tablets sold on this site are 100mg. Smaller doses can be achieved by splitting the pills. For example, if you are over the age of 65 or have had liver /kidney problems, the appropriate dose may be 25mg. Also if you are taking alpha blockers no more than 25 mg of Kamagra should be taken within 4 hours of your alpha blocker dose. Under no circumstances should Kamagra be taken more than once a day. Kamagra should not be taken by women or by children under the age of 18.

Ultram, commonly prescribed because of their effective analgesic, or pain relieving properties. Many studies have shown that properly managed medical use of pain killer compounds is safe and rarely causes addiction. Taken exactly as prescribed, opioids can be used to manage pain effectively.

Among the compounds that fall within this class — sometimes referred to as narcotics — are morphine, codeine, and related medications. Morphine is often used before or after surgery to alleviate severe pain. Codeine is used for milder pain. Opioids act by attaching to specific proteins called opioids receptors, which are found in the brain, spinal cord, and gastrointestinal tract. When these compounds attach to certain opioids receptors in the brain and spinal cord, they can effectively change the way a person experiences pain. In addition, opioids medications can affect regions of the brain that mediate what we perceive as pleasure, resulting in the initial euphoria that many opioids produce. They can also produce drowsiness, cause constipation, and, depending upon the amount taken, depress breathing. Taking a large single dose could cause severe respiratory depression or death.

Chronic use of Ultram can result in tolerance to the medications so that higher doses must be taken to obtain the same initial effects. Long-term use also can lead to physical addiction — the body adapts to the presence of the substance and withdrawal symptoms occur if use is reduced abruptly. Individuals taking prescribed Ultram should not only be given these medications under appropriate medical supervision, but also should be medically supervised when stopping use in order to reduce or avoid withdrawal symptoms. Symptoms of withdrawal can include restlessness, muscle and bone pain, insomnia, diarrhea, vomiting, cold flashes with goose bumps (“cold turkey”), and involuntary leg movements.

Individuals who become addicted to Ultram can be treated. Options for effectively treating Ultram addiction to prescription opioids are drawn from research on treating heroin addiction.

 Prolonged use of these drugs eventually changes the brain in fundamental and long-lasting ways, explaining why people cannot just quit on their own, and why treatment is essential. In effect, drugs of abuse take over the brain’s normal pleasure and motivational systems, moving drug use to the highest priority in the individual’s motivational hierarchy, thereby overriding all other motivations and drives. These brain changes, then, are responsible for the compulsion to seek and use drugs that we have come to define as addiction.

Nifedipine is a calcium ion influx inhibitor (calcium channel blocker or calcium ion antagonist).

The antianginal and antihypertensive actions of nifedipine are believed to be related to a specific cellular action of selectively inhibiting transmembrane influx of calcium ions into cardiac muscle and vascular smooth muscle. The contractile processes of these tissues are dependent upon the movement of extracellular calcium into the cells through specific ion channels. Nifedipine selectively inhibits the transmembrane influx of calcium through the slow channel without affecting, to any significant degree, the transmembrane influx of sodium through the fast channel. This results in a reduction of free calcium ions available within the muscle cells and an inhibition of the contractile processes. Nifedipine does not alter total serum calcium.

The specific mechanisms by which nifedipine relieves angina and reduces blood pressure have not been fully determined but are believed to be brought about largely by its vasodilatory action.

Nifedipine dilates the main coronary arteries and coronary arterioles both in normal and ischemic regions resulting in an increase in blood flow and hence in myocardial oxygen delivery.

Nifedipine by its vasodilatory action on peripheral arterioles, reduces the total peripheral vascular resistance. This reduces the workload of the heart and thus reduces myocardial energy consumption and oxygen requirements which probably accounts for the effectiveness of nifedipine in chronic stable angina.

The mechanism by which nifedipine reduces arterial blood pressure involves peripheral arterial vasodilation and subsequent reduction in peripheral vascular resistance. The increased peripheral vascular resistance that is an underlying cause of hypertension results from an increase in active tension in the vascular smooth muscle. Studies have demonstrated that the increase in active tension reflects an increase in cytosolic free calcium.

The negative inotropic effect of nifedipine is usually not of major clinical significance because at therapeutic doses, nifedipine’s vasodilatory property evokes a baroreceptor mediated reflex tachycardia which tends to counterbalance this negative inotropic effect. Continued administration of nifedipine to hypertensive patients has shown no significant increase in heart rate.

Levitra (Vardenafil) is an oral therapy for the treatment of erectile dysfunction.

Levitra (Vardenafil) comes as a tablet to take it orally. It should be taken, as needed about 1 hour before sexual activity. Some form of sexual stimulation is needed for an erection to occur with Levitra. Levitra should not be taken more than once a day. Levitra can be taken with or without food.
Levitra (Vardenafil) is an oral drug that is used to treat impotence (the inability to attain or maintain a penile erection.). It is a phosphodiesterase inhibitor that is similar to sildenafil (Viagra).
Penile erection is caused by the engorgement of the penis with blood. This engorgement occurs when the blood vessels delivering blood to the penis increase in size and increase the delivery of blood to the penis. At the same time, the blood vessels carrying blood away from the penis decrease in size and decrease the removal of blood from the penis. Sexual stimulation that leads to the engorgement and erection causes the production and release of nitric oxide in the penis. Nitric oxide then activates the enzyme, guanylate cyclase to produce cyclic guanosine monophosphate (cGMP). The cGMP is primarily responsible for increasing and decreasing the size of the blood vessels carrying blood to and from the penis, respectively. Vardenafil prevents an enzyme called phosphodiesterase-5 from destroying cGMP so that cGMP persists longer. The longer cGMP persists, the more prolonged the engorgement of the penis.

 
Before taking Levitra (Vardenafil), tell your doctor if you currently have or have ever had a heart attack, stroke, irregular heartbeats, angina (chest pain), or congestive heart failure; high or low blood pressure; if you have a personal or family history of a rare heart condition known as prolongation of the QT interval (long QT syndrome); liver problems or kidney problems; have ever had blood problems, including sickle cell anemia, multiple myeloma, or leukemia; have a bleeding or blood clotting disorder; have a stomach ulcer; a family history of degenerative eye disease (e.g., retinitis pigmentosa); or if you have a physical deformity of the penis such as Peyronie’s disease. You may not be able to take Levitra, or you may require a dosage adjustment or special monitoring during treatment if you have any of the conditions listed above. Although women do not indicate Levitra for use, it is in the FDA pregnancy category B. This means that Levitra is not expected to be harmful to an unborn baby. Women should not take Levitra. It is not known whether Levitra passes into breast milk. If you are over 65 years of age, you may be more likely to experience side effects from Levitra. Your doctor may prescribe a lower dose of the medication.