It can depend on the type of weight loss medication you’re using, but the most common side effects are flatulence, increased and sudden bowel movements, fatty or oily stools, diarrhea, constipation, headache and feeling sick.
Not everyone gets these symptoms, but if you do, they normally occur shortly after eating a meal that’s high in fat. They’re a lot less likely to occur if you reduce the number of fatty meals you have, and side effects tend to ease once your body has adjusted to the treatment.
Severe side effects are rare with weight loss treatments, but if you experience any signs of an allergic reaction (serious breathing difficulties, rash, itching, sweating, swelling in the face and throat, increased heart rate, nausea and vomiting) you should stop taking the treatment and get emergency medical attention immediately.
In the first instance, if you get any side effects, you should always contact our clinician. They may advise you to try an alternative medication, or to make further adjustments to your diet.