The medication drug Generic Bactrim is the combination of two antibiotics called sulfamethoxazole and trimethoprim. The drug is widely used to treat bacterial infections such as middle ear, urine, respiratory and intestinal infections. It is also used to treat a type of pneumonia bacteria- the drug is strictly restricted from children less than 2 months of age due to risk of serious side effects. It may give side effects it may not work for viral infections for example like flu etc. If used unnecessary it can cause various side effects to the internal or external body parts, so one should avoid without the doctor’s consultation.