Trianseril Deva is an oral medication used to treat high blood pressure. The main active ingredient in Trianseril Deva is triamterene, which is a type of diuretic (water pill). Trianseril Deva also contains hydrochlorothiazide, which is another type of diuretic. Trianseril Deva is used to treat high blood pressure by helping the body get rid of excess water and salt.