In clinical studies, tadalafil was shown to augment the hypotensive effects of nitrates. Therefore, administration of Cialis to patients who are using any form of organic nitrate is contraindicated see section 4. In interaction studies performed in a limited number of healthy volunteers, these effects were not reported with alfuzosin or tamsulosin. In general, generic medications might have slightly different inactive ingredients dyes, preservatives, flavouring agents etc. There was no evidence of favourable clinical effect of the combination in the population studied. Aspirin Tadalafil 10mg and 20mg did not potentiate the increase in bleeding time caused by aspirin.Tadalafil is the generic name of a drug. Cialis® is the brand name owned by the company Eli Lilly. It is a phosphodiesterase type 5 (PDE5) inhibitor used for erectile dysfunction . Tadalafil is used to treat erectile dysfunction, a condition where you are unable to get or keep an erection firm enough to have sexual intercourse. It works by . Sire – Men’s Health Clinic. Tadalafil is now available in Singapore. Learn more about how it compares to Cialis and how it can help you overcome erectile dysfunction.