Medical References
- Pfizer: Viagra (Sildenafil Citrate) Prescribing Information
- MedlinePlus: Sildenafil Drug Information
- NHS: How and When to Take Sildenafil
- NHS: Side Effects of Sildenafil
- NHS: Taking Sildenafil With Other Medicines and Herbal Supplements
- NIDDK: Symptoms and Causes of Erectile Dysfunction
- NIDDK: Treatment for Erectile Dysfunction
- Centurion Laboratories: Sildenafil Tablets Product Information
Medical Disclaimer
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