Viagra pills online

Sildenafil under the name Viagra is used to treat erectile dysfunction (impotence) in men. Another brand of sildenafil is Revatio, which is used to treat pulmonary arterial hypertension and improve exercise capacity in men and women.

What is the most important information I should know about Viagra?

A small number of patients have had a sudden loss of eyesight after taking Viagra. This type of vision loss is caused by decreased blood flow to the optic nerve of the eye. It is not clear whether Viagra is the actual cause of such vision loss. Sudden vision loss with Viagra use has occurred most often in people with 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.

What should I discuss with my healthcare provider before taking Viagra?

A small number of patients have had a sudden loss of eyesight after taking Viagra. This type of vision loss is caused by decreased blood flow to the optic nerve of the eye. It is not clear whether Viagra is the actual cause of such vision loss. Sudden vision loss with Viagra use has occurred most often in people with 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.

Before taking Viagra, tell your doctor if you have:

• heart disease or heart rhythm problems;

• a recent history (in the past 6 months) of a heart attack, stroke, or heart rhythm disorder;

• congestive heart failure;

• high or low blood pressure;

• coronary artery disease;

• liver disease;

• kidney disease;

• a blood cell disorder such as sickle cell anemia, multiple myeloma, or leukemia;

• a bleeding disorder such as hemophilia;

• a stomach ulcer;

• retinitis pigmentosa (an inherited condition of the eye);

• a physical deformity of the penis (such as Peyronies disease); or

• if you have been told you should not have sexual intercourse for health reasons.

If you have any of these conditions, you may not be able to use Viagra or you may need a dosage adjustment or special tests during treatment.

How should I take Viagra?

Take Viagra exactly as it was prescribed for you. Do not take it in larger doses or for longer than recommended by your doctor.

Revatio is usually taken three times each day, about 4 to 6 hours apart.

Viagra is usually taken only when needed, 30 minutes to 1 hour before sexual activity. You may take it up to 4 hours before sexual activity. Do not take Viagra more than once per day.

Viagra can help you have an erection when sexual stimulation occurs. An erection will not occur just by taking a pill. Follow your doctors instructions.

If you become dizzy or nauseated, or have pain, numbness, or tingling in your chest, arms, neck, or jaw during sexual activity, stop and call your doctor right away. You could be having a serious side effect of Viagra.

What happens if I miss a dose?

Viagra is used as needed, so you are not likely to miss a dose.

If you miss a dose of Revatio, take the missed dose as soon as you remember. If it is almost time for your next dose, skip the missed dose and take the medicine at the next regularly scheduled time. Do not take extra medicine to make up the missed dose.

What happens if I overdose?

What should I avoid while taking Viagra?

What are the possible side effects of Viagra?

Stop using Viagra and call your doctor at once if you have any of these serious side effects:

• chest pain or heavy feeling, pain spreading to the arm or shoulder, nausea, sweating, general ill feeling;

• irregular heartbeat;

• swelling in your hands, ankles, or feet;

• shortness of breath;

• vision changes;

• feeling light-headed, fainting; or

• penis erection that is painful or lasts 4 hours or longer.

Continue taking Viagra and talk with your doctor if you have any of these less serious side effects:

• warmth or redness in your face, neck, or chest;

• stuffy nose;

• headache;

• upset stomach; or

• back pain.

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.

What other drugs will affect Viagra?

Before taking Viagra, tell your doctor if you are using any of the following medications:

• bosentan (Tracleer);

• cimetidine (Tagamet, Tagamet HB);

• an antibiotic such as erythromycin (E-Mycin, Eryc, Ery-Tab) or clarithromycin (Biaxin);

• doxazosin (Cardura), prazosin (Minipress), Terazosin (Hytrin);

• HIV medicines such as amprenavir (Agenerase), tipranavir (Aptivus), darunavir (Prezista), efavirenz (Sustiva), nevirapine (Viramune), indinavir (Crixivan), saquinavir (Invirase, Fortovase), lopinavir/ritonavir (Kaletra), fosamprenavir (Lexiva), ritonavir (Norvir), atazanavir (Reyataz), or nelfinavir (Viracept);

• an antifungal medication such as itraconazole (Sporanox) or ketoconazole (Nizoral);

• carbamazepine (Tegretol), phenobarbital (Luminal), or phenytoin (Dilantin); or

• rifampin (Rifadin, Rimactane) or rifabutin (Mycobutin).

If you are using any of these drugs, you may not be able to take Viagra, or you may need dosage adjustments or special tests during treatment.

There may be other drugs not listed that can affect Viagra. Tell your doctor about all the prescription 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.

Where can I get more information?

• Your pharmacist has additional information about Viagra written for health professionals that you may read.

What does my medication look like?

Sildenafil is available with a prescription under the brand names Viagra and Revatio. Other brand or generic formulations may also be available. Ask your pharmacist any questions you have about this medication, especially if it is new to you.

• Revatio 20 mgwhite, film-coated round tablets

• Viagra 25 mgblue, film-coated tablets with a rounded-diamond shape

• Viagra 50 mgblue, film-coated tablets with a rounded-diamond shape

• Viagra 100 mgblue, film-coated tablets with a rounded-diamond shape