fildena 150 mg is the strongest dosage of sildenafil citrate available. It should be taken approximately 30-60 minutes before sexual activity, and will remain effective for 4-6 hours. The most common side effects are headache, flushing, upset stomach, and nasal congestion. In rare cases, more serious side effects can occur, such as priapism (a prolonged erection lasting more than four hours) or sudden vision loss. If you experience any of these side effects, seek medical attention immediately.
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