Intermediate-acting sulfonamides (t1/2 ranging between 10 and 24 h) Sulfasomizole, sulfamethoxazole Short-acting sulfonamides (t1/2 ≤ 20 h) Sulfamethiazole, sulfaisoxazole Injectable (soluble sulfa drugs) Sulfafurazole, sulfadiazine, sulfamethoxine ...