You can purchase and use medical products from this drugstore as they are safe. If you buy sildenafil for erectile dysfunction, it can also be known by the brand names Viagra, Aronix, Liberize and Nipatra. Never take 2 doses at the same time. Patients taking concomitant inhibitors of CYP3A4 may benefit from initiation at the lower dosage. The recommended dosage for tablet and oral suspension formularies is 5 mg or 20 mg three times daily, 4 to 6 hours apart. Injections are dosed at 2.Viagra vs. over-the-counter products. Many over-the-counter (OTC) products may be advertised to help with ED. Examples of these products include: dehydroepiandrosterone (DHEA) ginseng;. Viagra comes as an oral tablet in different dosages. Discuss with your doctor what’s an appropriate dose for you. For daily use, Goldstein said, the generic form, sildenafil, comes in mg tablets. mi Closed () Get Coupon Add to Pricing Basket FOOD LION PHARMACY AS LOW AS $ Use this coupon to get this price at any FOOD LION .