H 49 WHITE OVAL PILL – IDENTIFICATION, DOSAGE, SIDE EFFECTS
A white oval pill debossed with H 49 is a generic prescription formulation of Sulfamethoxazole and Trimethoprim Double Strength (800 mg / 160 mg). Commonly referred to by brand names such as Bactrim DS or Septra DS, it is a combination antibiotic from the sulfonamide class.