Duratia 90 mg relaxes the muscles of the blood vessels of the penis, allowing blood to flow through into the penis with ease. As a result, the man can get a firm erection during sexual stimulation. Always consume the medicine as directed by the doctor. Nausea, vomiting, indigestion, headache, flushing (sense of warmth in the face, ears, neck, and trunk), dry mouth, and nosebleeds are some of the common side effects while consuming the medicine. This doesn't mean you will have all of them; you may experience one of them or none of them.