Trimethoprim 
Uses
Trimethoprim is used in the treatment of bacterial infections.
How it Works
Trimethoprim is known as an antibiotic. Trimethoprim stops the bacterial cells from producing folic acid, Folic acid is a vitamin required for bacterial replication.
Common Side effects
Patients who take Trimethoprim may suffer from such side effects;
Nausea,
Vomiting,
Skin rash,
Allergic reaction