Viagra

Drug Name

Viagra (Sildenafil)

Drug Uses

Viagra is used to treat the dysfunction eréctil (masculine impotence, for example). It works, helping the flow of blood in the penis to reach and to maintain an erection during the sexual stimulation.

How to use

Viagra is in order that 30 minutes were taken to 1 hour before the sexual activity. You can take it up to 4 hours before the sexual activity. Viagra is not supposed to be taken more at once in a day.

Drug Class and Mechanism

Viagra is a phosphodiesterase type 5 inhibitor and it works by helping the blood flow into the penis to achieve and maintain an erection during sexual stimulation.

Missed Dose

Viagra is to be used as necessary, so you are not supposed to take it according to a schedule.

Storage

Viagra is to be kept in its original container. It is to be stored at room temperature between 59 and 86 degrees F (15-30 degrees C) away from moisture, heat and light and out of the reach of children.

Warnings/Precautions

Do not take Viagra, if you are using any drugs containing nitrate for pains in the chest or cardiac problems, including the nitroglycerine (Nitrostat, Nitrolingual, Nitro-Dur, Nitro-Bid MINITRAN, Deponit, Transderm-Nitro), dinitrato of isossorbida (Dilatrate-SR, Isordil, Sorbitrate) and mononitrate of isosorbida (Imdur, ISMO, Monoket), or recreational drugs such as the nitrate or nitrito of amilo ("poppers").
Before taking Viagra, inform his doctor about all the other medicines that you use for dysfunction erétil, or if you are using any one of the next medicines:

• bosentano (Tracleer);
• a diluidor of the blood as the warfarina (Coumadin);
• cimetidina (Tagamet, Tagamet HB);
• an antibiotic as the eritromicina (E-Mycin, Eryc, Ery-Tab) or claritromicina (Biaxin);
• doxazosina (Cardura), prazosin (Minipress), Terazosin (Hytrin);
• VIH like amprenavir (Agenerase), tipranavir (Aptivus), darunavir (Treatment Action Campaign), Efavirenz (Sustiva), nevirapina (Viramune), indinavir (Crixivan), saquinavir (Invirase, Fortovase), the lopinavir / ritonavir (Kaletra), fosamprenavir (Lexiva), ritonavir (Norvir), atazanavir (Reyataz), or nelfinavir (Viracept);
• an antifúngicos such as itraconazol (Sporanox) or cetoconazol (Nizoral);
• carbamazepina (Tegretol), fenobarbital (Luminal), or fenitoína (Dilantin); or
• rifampicina (Rifadin, Rimactane) or rifabutina (Mycobutin).

His doctor informs about all the prescription and overnight market the - counter medicines that you use. That includes vitamins, minerals, products herbais and medicines prescribed by other doctors. Do not begin to use a new medication without informing his doctor.
If you have serious cardiac problems the sufficient thing to do a sexual activity dangerously, you must avoid the use of Viagra. to use it with caution, if you had a heart attack, hemorrhage or risk of life irregularidades heart, in the last 6 months. Equally cautious being, if you have very high or low blood pressure, heart failure or unstable angina.
In case of cardiac symptoms in development (for example, dizzinesses, nausea and pain in the chest) during the sexual activity, do not continue. His doctor informs it about the problem as quickly as possible.
If you will have a condition that can turn in long term lasting erections, like the falcate anemia, mieloma multiple (a disease of the bone marrow) or leukemia, the use of Viagra with caution. Also use with caution if you have a genital problem or deformity, like the disease of Peyronie. If an erection lasts more than 4 hours, to look for treatment immediately. Constant damages and impotence can result.
If you have a disturbance hemorrágico, a stomach ulcer, or the known hereditary disease of the eyes how retinose pigmentária, the use of Viagra with caution. His security, in these circumstances, has not been still studied.

Possible Side Effects

If it feels some of the next serious side effects, stop taking Viagra and looking for medical service of emergence or his doctor immediately:

• sudden loss of vision;
• buzzing in the ears, or sudden audition loss;
• pain in the chest or sensation of weight, pain that stretches out for the arm or the shoulders, nausea, sweats, generalized sensation of evil;
• irregular cardiac beats;
• inchaço of the hands, ankles or feet;
• lack of air;
• alterations of the vision;
• dizzinesses, faints; or
• erection of the penis that is painful or lasts 4 hours or more.

Less serious secondary effects can include:

• heat or blush in the face, neck or chest;
• blocked nose;
• headache;
• stomach ache; or
• pain in the back.

This is not a complete list of the secondary effects and others can take place. Inform his doctor about any uncommon side effect or uncomfortable.

More Information

If you are older than 65 years, you can suffer Viagra side effects. However, your physician may prescribe you a lower dose of this medication.