Common side effects include:
The most common side effects are gastrointestinal disturbances (nausea, vomiting, diarrhea, loss of appetite).
Rare but serious side effects include:
Stop taking co-trimoxazole and tell your doctor immediately if you have an allergic reaction. The symptoms of a drug allergy include one or more of the following:
In rare instances, a skin rash may be followed by a more severe reaction, such as Stevens-Johnson Syndrome (SJS) and toxic epidermal necrolysis (TEN). These are life threatening skin-reactions, that are characterized by skin rash, multiple ulcers in the mouth/throat/nose/genitals, fever, and may progress to widespread blistering or peeling of the skin. Hence, do seek urgent advice from a healthcare provider immediately if any of the above occur.
Other rare side effects include:
If you experience any of these symptoms, you should stop your medications and see your healthcare professional immediately.
Inform your healthcare professional if: