Archive for December 2010
Viagra relaxes muscles and increases blood flow to particular areas of the body.
Sildenafil under the name Viagra 50mg and 100mg is used to treat erectile dysfunction in men. Another brand of sildenafil is Revatio, which is used to treat pulmonary arterial hypertension and improve exercise capacity in men and women. Do not take Viagra 100mg while also taking Revatio, unless your doctor tells you to.
Viagra 50mg may also be used for other purposes.
For most patients, the recommended dose is 50 mg taken, as needed, approximately 1 hour before sexual activity. However, Viagra may be taken anywhere from 4 hours to 0.5 hour before sexual activity. Based on effectiveness and toleration, the dose may be increased to a maximum recommended dose of 100 mg or decreased to 25 mg. The maximum recommended dosing frequency is once per day.
Do not take Viagra 50mg or 100mg if you are also using a nitrate drug for chest pain or heart problems. This includes nitroglycerin, isosorbide dinitrate, and isosorbide mononitrate. Nitrates are also found in some recreational drugs such as amyl nitrate or nitrite. Taking Viagra 50mg or 100mg with a nitrate medicine can cause a serious decrease in blood pressure, leading to fainting, stroke, or heart attack. During sexual activity, if you become dizzy or nauseated, or have pain, numbness, or tingling in your chest, arms, neck, or jaw, stop and call your doctor right away. You could be having a serious side effect of Viagra 50mg or 100mg.
Do not take Viagra 100mg more than once a day. Allow 24 hours to pass between doses. Contact your doctor or seek emergency medical attention if your erection is painful or lasts longer than 4 hours. A prolonged erection can damage the penis.
Viagra 100mg can decrease blood flow to the optic nerve of the eye, causing sudden vision loss. This has occurred in a small number of people taking Viagra 100mg, most of whom also had heart disease, diabetes, high blood pressure, high cholesterol, or certain pre-existing eye problems, and in those who smoke or are over 50 years old. It is not clear whether Viagra 100mg is the actual cause of vision loss.
Stop using Viagra 100mg and get emergency medical help if you have sudden vision loss.
If you experience any of the following serious side effects, stop taking Viagra 50mg and seek emergency medical attention:
- sudden vision loss;
- ringing in your ears, or sudden hearing loss;
- chest pain or heavy feeling, pain spreading to the arm or shoulder, nausea, sweating;
- irregular heartbeat;
- swelling in your hands, ankles, or feet;
- shortness of breath;
- feeling light-headed, fainting;
- penis erection that is painful or lasts 4 hours or longer.
Less serious side effects Viagra 100mg may include:
- redness in your face, neck, or chest;
- stuffy nose;
- upset stomach;
- back pain.
This is not a complete list of side effects Viagra 50mg and 100mg and others may occur. Tell your doctor about any unusual or bothersome side effect Viagra 50mg and 100mg.
Do not take Viagra 50mg and 100mg, if you are also using a nitrate drug for chest pain or heart problems, including nitroglycerin , isosorbide dinitrate, and isosorbide mononitrate, or recreational drugs such as amyl nitrate or nitrite.
Before taking Viagra 50mg and 100mg, tell your doctor about all other medications you use for erectile dysfunction, or if you are using any of the following medications:
- a blood thinner such as warfarin;
- an antibiotic such as erythromycin or clarithromycin;
- doxazosin, prazosin, Terazosin;
- HIV medicines such as amprenavir, tipranavir, darunavir, efavirenz, nevirapine, indinavir, saquinavir, lopinavir/ritonavir, fosamprenavir, ritonavir, atazanavir, or nelfinavir;
- an antifungal medication such as itraconazole or ketoconazole;
- carbamazepine, phenobarbital, or phenytoin; or
- rifampin or rifabutin.
Tell your doctor about all the prescriptions and over-the-counter medications you use. This includes vitamins, minerals, herbal products, and drugs prescribed by other doctors. Do not start using a new medication without telling your doctor.
If you have heart problems severe enough to make sexual activity a dangerous, you should avoid using Viagra 50mg and 100mg. Use it cautiously, if you’ve had a heart attack, stroke, or life-threatening heart irregularities within the past 6 months. Be equally cautious, if you have severe high or low blood pressure, heart failure or unstable angina.
In case of cardiac symptoms developing during sexual activity, do not continue. Tell your doctor about the problem as soon as possible.
If you have a condition that might result in long-lasting erections, such as sickle cell anemia, multiple myeloma (a disease of the bone marrow), or leukemia, use Viagra 50mg and 100mg with caution. Also use cautiously if you have a genital problem or deformity such as Peyronie’s disease. If an erection lasts more than 4 hours, seek treatment immediately. Permanent damage and impotence could result.
If you have a bleeding disorder, a stomach ulcer, or the inherited eye condition known as retinitis pigmentosa, use Viagra 50mg and 100mg with caution. Its safety under these circumstances has not been studied yet.