Sildenafil is usually taken when needed. It can be taken anywhere from 4 hours to one-half hour before sexual activity. Generally, it is taken 1 hour before sexual activity. The medication can help achieve an erection when sexual stimulation occurs. An erection will not occur just by taking a pill. Follow your doctor's instructions.
mild dizziness; headache; nasal congestion; diarrhea;
Your pharmacist has additional information about sildenafil written for health professionals that you may read.
mild dizziness; headache; nasal congestion; diarrhea;
Other, less serious side effects may be more likely to occur. Continue to take sildenafil and talk to your doctor if you experience flushing;