Pethidine
Also sold as: Demerol
Prescription neededStrong painkillers (opioids)
Comes as:Injection
Usual adult dose
Dose is set by your doctor. Given by injection in hospital for short-term severe pain, for example during labour. Not for long-term use.
Your doctor may give you a different dose. Children's doses depend on weight.
Side effects
Common
- nausea
- vomiting
- dizziness
- drowsiness
- sweating
Serious — get help
Stop taking it and see a doctor straight away if you notice:
- slow breathing
- seizures
- low blood pressure
- confusion or agitation
Do not take it, or take care, if
- Severe breathing problems
- Severe kidney disease
- Epilepsy
- Head injury
- Taking antidepressants (use with caution)
Interactions
Medicines that can react with this one.
Serious3 medicinesDo not take these together unless your doctor says so.
- Diazepam
Together they can cause deep sleepiness and dangerously slow breathing.
- Fluoxetine
Risk of serotonin syndrome.
- Sertraline
Risk of serotonin syndrome.