The information contained herein is not a substitute for and should never be relied upon for professional medical advice. Rarely reported side effects include: an erection that will not go away priapism. We discuss if this is possible in our guide to viagra and addiction. If you have severe or persistent ED, your healthcare provider may increase your Viagra dosage to mg. Take note of the expiration date printed on your Viagra or generic sildenafil and aim to use the medication as prescribed before it expires.In the United Kingdom, it is available over the counter. Most of the active pharmaceutical ingredient, sildenafil citrate, is produced Viagra Connect (50 mg), to be sold over the . If you’re holding out for a generic version of branded Viagra, you won’t have to wait much longer. Teva Pharmaceuticals plans to release its generic of the “little blue pill” as early . Is Viagra Available Over the Counter? In the United States, Viagra is a prescription medication, meaning you’ll only be able to buy and use it with a prescription from your .