Blueberry 100 sildenafil 100mg try not to eat grapefruit or drink grapefruit juice while you are being treated with Sildenafil. Take Dapoxetine by mouth with a glass of water, with or without food. Avoid cutting, crushing or chewing this medicine. Do not take the medicine more often than it is prescribed. Do not give up taking it except on the advice of your doctor. It may need time for the medicine to help. Consult your doctor concerning the proper dose for you. If you think you have used too much of this medicine seek emergency medical attention right away. The symptoms of overdose usually include chest pain, nausea, irregular heartbeat, and feeling light-headed or fainting.