Bactrim DS is an antibiotic used in treating certain conditions that are caused by bacteria. It is also used as a preventive medication for certain infections. This drug works by killing bacteria.
People who are allergic to Bactrim DS or other sulfonamide drugs are advised not to use this drug. Patients with anemia, severe kidney problems or liver disease should also not use the drug. A person using medication, such as methenamine or dofetilide, should not take Bactrim DS, as stated by Drugs.com. This drug can be taken with or without food as directed by a doctor. It has some possible side effects, including mild diarrhea, vomiting, nausea and appetite loss.