Duratia 90 is a medication containing 90mg of dapoxetine, which is used to treat premature ejaculation. It works by increasing serotonin levels in the brain to improve control over ejaculation and increase the time it takes to ejaculate. The recommended dosage is to take one Duratia 90 tablet orally 1-3 hours before anticipated sex. Common side effects include dizziness, headache, nausea and fainting. It should be used cautiously in those with medical conditions or taking other medications due to potential drug interactions.