Viagra, the brand name for sildenafil citrate, is a prescription medication used to treat erectile dysfunction. During sexual stimulation, the oral drug helps increase the blood flow to the penis, which assists with gaining and keeping an erection, according to Drugs.com. Viagra might cause adverse reactions, and individuals need to closely follow the directions given by the physician or pharmacist. Viagra is a blue pill available in 25 mg, 50 mg and 100 mg dosage options.
Getting the Prescription
Visit a physician to discuss erectile dysfunction issues. The physician will need to perform a physical on the man to be sure he is healthy enough for sexual activity. Possible contraindications for taking Viagra include certain heart conditions, liver disease, kidney disease and stomach ulcers.
Taking Viagra
Take a dose of Viagra approximately 30 minutes to an hour prior to anticipated sexual activity. A common starting dose for Viagra is 50 mg, but ranges between 25 mg and 100 mg might be prescribed depending on the effectiveness of the dose, according to RxList.com. Avoid taking the medication more than 4 hours before sexual activity. Take Viagra only once per day and store the medication at room temperature.
Manual Stimulation
Stimulate the penis to achieve an erection. Viagra alone will not cause an erection, according to Drugs.com. Use a condom to prevent pregnancy and for protection against sexually transmitted diseases. Viagra will not protect against these events, according to Pfizer Inc., the medication manufacturer.
Watching for Side Effects
Call a physician immediately for any symptoms of a serious adverse reaction. Possible serious reactions include dizziness, nausea, vision loss or pain in the chest, arm or jaw. Get emergency medical attention for these side effects. Seek medical attention for an erection lasting longer than 4 hours or for a painful erection. Permanent damage might occur to the penis with a sustained erection.
