Viagra (Sildenafil Citrate)

What are the Most Common Viagra Side Effects?

As any medication, Viagra may cause unwanted effects. Of course, not everyone taking Viagra will have these problems. According to the results of clinical studies, only 2.5% of patients stopped taking Viagra because of adverse reactions. In most cases Viagra side effects are not significant and do not require the therapy cessation.

Viagra has been properly studied in many clinical studies involving 3,700 men all over the world. In these investigations, side effects were compared in patients taking Viagra and those which received a sugar pill (placebo). This way, it is possible to determine real Viagra side effects, how often they occur in comparison with placebo. Based on these studies, the most common Viagra side effects include:

• Headache - this side effect was observed in up to 16% of people
• Hot flashes - up to 10%
• Stomach upset, dyspepsia - up to 6-7%
• Urogenital infections - up to 3-4%
• Vision problems - problems with recognizing colors, blurred vision - up to 3%
• Diarrhea - up to 3%
• Dizziness - up to 2%
• Skin rash - up to 2%

The following side effects were observed in less than 2% of patients and were found in those patients taking placebo pill:

• Infections of the respiratory system
• Back and joint pain
• Flu-like and common cold symptoms

The following side effects were observed in less than 1% of patients. It is difficult to determine if these side effects are associated with Viagra use. They include: migraine, temporary vision loss, vomiting, dry mouth, anemia, gout, arthritis, depression, urinary incontinence, seizure, anxiety, priapism, insomnia, asthma, sinusitis, cataracts. It is not proved that Viagra causes serious cardiovascular complications: heart attacks, strokes, arrhythmias, transient ischemic attack, pulmonary bleedings. These side effects may occur in patients suffering from cardiovascular diseases and when excessive sexual activity is contraindicated.