Delgra®50 mg is composed of PDE5 inhibitor Sildenafil Citrate 50 mg. Sildenafil Citrate 50 mg in Delgra® 50 mg is chemically designated as 1-[[3-(6, 7-dihydro-1-methyl-7-oxo-3-propyl-1H-pyrazolo[4, 3d]pyrimidin-5-yl)-4 ethoxyphenyl]sulfonyl]-4-methylpiperazine citrate. Sildenafil Citrate in Delgra® 50 mg is a off-white crystalline powder with a molecular weight of 666. 7 and a solubility of 3. 5 mg/ml in water. Delgra 50 mg tablets are bluish colored. Delgra®50 mg tablets are in the shape of a diamond. Delgra®50 mg is a oral medicine prescribed in Erectile Dysfunction. In Erectile Dysfunction there is difficulty in getting an Erection or sustaining an Erection. Delgra®50mg relaxes smooth muscles and thereby increases blood flow in the penis during sexual intercourse. The dosage of Delgra®50 mg is one tablet thirty minutes to four hours prior to sexual intercourse. Don't take Delgra® 50 mg with nitrates. Delgra®50 mg cannot be taken with alpha blockers. Delgra®50mg cannot be taken with antibiotics, antifungal formulations, Bosentan, Imatinib, St John's wort, Boceprevir, Carbamazepine, Fosphenytoin, Isoniazid, Cimetidine, blood pressure medications, HIV/AIDS medications, Grapefruit juice and high fat meal. Delgra®50 mg is very well tolerated with very less serious side effects. The side effects of Delgra®50 mg includes nasal congestion, headache, flushing, nausea, dyspepsia, diarrhea and visual disturbance. Stop taking Delgra®50 mg if there is a prolonged erection lasting more than 6 hours. Delgra®50 mg should be stored in a cool and dry place and away from Sunlight. Delgra®50 mg should be kept away from children's and pets.