As with any medication, you may also experience side effects from weight loss medication. These are usually mild and involve gastrointestinal symptoms. Below is an overview of the possible side effects for each medication:
- Wegovy: Nausea, vomiting, diarrhoea, constipation, headache, abdominal pain, weakness or fatigue.
- Mounjaro: Nausea, diarrhoea, vomiting, constipation, abdominal pain.
- Saxenda: Nausea, vomiting, diarrhoea, constipation, headache.
- Orlistat: Headache, abdominal pain, flatulence, an increased need to open your bowels.
- Mysimba: Nausea, constipation, vomiting, dizziness, dry mouth.
These side effects are often mild and tend to occur more frequently during the first few days or weeks of treatment, or after a dose increase. For many people, these symptoms lessen over time, although this varies from person to person and depends on the medication. However, this is not the case for everyone. Everyone reacts differently to medication. Therefore, always read the patient information leaflet for a full list of possible side effects and risks.
Contact a doctor immediately if you experience any of the following serious side effects:
- Mood swings, low mood, anxiety or aggression (especially with Mysimba)
- Increased blood pressure or heart palpitations.
- Seizures, loss of consciousness or dizziness (if it is not a common side effect)
- Erectile dysfunction
- Persistent nausea, vomiting, abdominal pain, fatty diarrhoea or stomach symptoms
- Sudden pain in your side (flank), lower back or upper abdomen (which may spread to your back), or in your upper-right abdomen
- Jaundice (yellowing of the skin or eyes), skin abnormalities
- Signs of dehydration
This is not an exhaustive list of serious side effects that require you to contact a doctor. For a full list, please review the patient information leaflet carefully.