Generally, the recommended dose of sildenafil is 50 mg taken up to once daily.
Sildenafil is used for the treatment of erectile dysfunction and is commonly used clinically as an oral dose of sildenafil citrate, taken on demand approximately one hour prior to sexual activity, and the dose may be increased to 100 mg or decreased to 25 mg based on potency and individual tolerance.
Possible adverse reactions to sildenafil citrate include headache, dizziness, nasal congestion, indigestion, and visual abnormalities. Sildenafil Citrate should be used with caution in people with anatomical malformations of the penis and is contraindicated in people taking nitrates.
Treatment of erectile dysfunction should go to the hospital to clarify the cause of the disease, the doctor to draw up a treatment plan, and follow the doctor’s instructions to use the drug, can not be taken without authorization.