sentences:  Sulfadimethoxine can either be given alone (such as under the commercial name Albon) or in combination with ormetoprim to as a "potentiated sulfonamide" to increase antimicrobial activity.Ormetoprim is a diaminopyridine, inhibiting dihydrofolate reductase, which is further along the pathway for synthesizing folic acid.Though the optimum ratio of sulfadimethoxine to ormetoprim has been found to be 20