Viagra (also known as Sildenafil) is widely known as the all-around impotence cure and has become synonymous with sexual pleasure. A wonder drug for those who suffer from erectile dysfunctions, it acts by relaxing the muscles of the genitalia increasing the blood flow to the penis, with the very satisfactory result of a normal erection. Studies have shown it to be a great solution to the problems of men having erection problems, almost 100% of the subjects being able to obtain and maintain an erection, long enough for a normal sexual encounter to occur.
Viagra Indications

Viagra is a drug famous for its strong effect in the treatment of erectile dysfunction in men. It acts by reducing the functionality of a certain enzyme (phosphodiesterases) and regularizing the erection procedure – for this effect to occur, it is recommended that sexual play with the penis should also be employed. Although there are other medicines in the same drug category as Viagra, this drug results in much firmer erections and its results occur within 10-15 minutes from the intake.
Viagra Warnings

Viagra treatment may result in some serious complications in certain cases. You should let your personal health care specialist know of any medical conditions you are currently suffering from, or may have suffered. Some are of great importance when prescribing Viagra, and your dosage may vary depending on several such factors. Some of the most important health problems that affect Viagra treatment are:
Heart attack
Stroke
Coronary artery disease
Angina
High or low blood pressure
Liver problems
Kidney affections
Sickle cell anemia or leukemia
Bleeding disorder
Stomach ulcer
Retinitis pigmentosa
Peyronie’s disease
Diabetes

Users of over 65 years of age should take extra precautions as side effects are more likely to appear after that age. Side effects also have a larger chance of occurring in smokers.
There is also a chance that erections longer than four hours may occur. Should you experience that, immediately contact your personal health care specialist, to avoid permanent damage to your penis.
Viagra Intake Guidelines

Consult your personal health care specialist to obtain the best dosage according to your age, health condition and medical history. Take your dose of Viagra with a glass of water, at least one hour after a full course meal, around one hour before the sexual play. Do not take more than once per day, allowing a 24 hour interval between intakes. It is best that you should avoid grapes or grape juice while taking Viagra.
Viagra Dosage

Consult your personal health care specialist to obtain the Viagra dosage appropriate for you, as it will depend largely on your age, health and medical history, as well as a number of other factors.
Viagra Overdose

Although there have been no serious cases of Viagra overdose, it is still better to consult your personal health care specialist about the recommended dosage and not exceed that dosage. Studies have not established if Viagra overdose is potentially lethal, but there is always a chance for life-threatening complications to occur. Should you have reasons to believe you are suffering from an overdose, immediately contact your physician or seek emergency medical attention at the nearest hospital, or contact the local poisons center.
Viagra Missed Dose

Viagra is a need-based drug with no regular intake schedule, hence there is no risk of missing any doses.
Viagra Side Effects

There are some side effects to Viagra treatment. Some of them include allergic reactions like excessive weakness, breathing troubles, closed throat, swellings of the lips, tongue or face. Other unwanted effects are headaches, sudden flushing, Nasal congestion, diarrhea, skin itching or rashes. Should these effects occur, consult your personal health care specialist to investigate and establish the causes and take the proper course of action.
Other more serious side effects of Viagra may require immediate medical attention, but are rare. These include: chest pains, fluctuating heartbeat, swollen ankles or legs, vomiting, angina pain with uneasiness in the chest, arms or jaws, altered vision, light sensitivity, urination problems with pain in the bladder, frequent or bloody urine, drowsiness, bleeding of the eye, redness, swollen eyes, improper erection with pain. Should you experience any of these symptoms contact your physician or go to the nearest hospital immediately.

What side effects may I notice from taking sildenafil?
Side effects that you should report to your prescriber or health care professional as soon as possible:
•changes in hearing such as loss of hearing or ringing in ears
•changes in vision such as loss of vision, blurred vision, eyes being more sensitive to light, or trouble telling the difference between blue and green objects or objects having a blue color tinge to them
•difficulty breathing, shortness of breath
•chest pain or palpitations
•prolonged erection (lasting longer than 4 hours)
•skin rash, itching

Side effects that usually do not require medical attention (report to your prescriber or health care professional if they continue or are bothersome):
•diarrhea
•dizziness
•flushing
•headache
•indigestion
•nasal congestion

What should I watch for while taking sildenafil?
If you notice any changes in your vision while taking this drug, notify your prescriber or health care professional as soon as possible. Stop using sildenafil right away if you have a loss of sight in one or both eyes. Contact your healthcare provider immediately.

Contact you physician immediately if the erection lasts longer than 4 hours or if it becomes painful. This may be a sign of priapism and must be treated immediately to prevent permanent damage.

If you experience symptoms of nausea, dizziness, chest pain or arm pain upon initiation of sexual activity after sildenafil use, you should refrain from further activity and should discuss the episode with your prescriber or health care professional as soon as possible.
Do not change the dose of your medication. Please call your prescriber or health care professional to determine if your dose needs to be reevaluated.

Using Viagra® (sildenafil) does not protect you or your partner against HIV infection (the virus that causes AIDS) or other sexually transmitted diseases.

Where can I keep my medicine?
Keep out of reach of children in a container that small children cannot open.

Store at room temperature between 15 and 30 degrees C (59 and 86 degrees F). Throw away any unused medicine after the expiration date.