Can I take Propranolol and Sertraline together?

Why this happens

Sertraline can interfere with the way the liver breaks down propranolol (by affecting an enzyme called CYP2D6). This means the propranolol stays in your system longer and reaches higher levels than intended.

You can usually take these medicines together, but you should be monitored by your doctor. If you notice your pulse feels unusually slow, or if you feel dizzy, faint, or extremely tired, contact your GP. Your doctor may need to adjust your propranolol dose.

Asthma or COPD

You must not take propranolol if you have asthma or a history of wheezing. It can cause a severe, life-threatening narrowing of your airways.

Bleeding disorders or use of blood thinners

Sertraline increases your risk of serious bleeding, especially in the stomach. This risk is much higher if you also take aspirin, ibuprofen, or blood-thinning medications like warfarin.

Diabetes

Propranolol can hide the warning signs of low blood sugar (hypoglycaemia), such as a fast heartbeat or tremors. You must monitor your blood sugar more closely.

Alcohol

Drinking alcohol while taking propranolol can cause your blood pressure to drop too low. This may make you feel dizzy, lightheaded, or faint. It is best to avoid or strictly limit alcohol, especially when starting treatment or increasing your dose.

Caffeine (Coffee, Tea, Energy Drinks)

Propranolol is often prescribed to reduce physical symptoms of anxiety or to lower heart rate. Caffeine is a stimulant that increases heart rate and can worsen anxiety, effectively working against the medicine. High intake of caffeine may reduce how well propranolol works for you.

Grapefruit Juice

Grapefruit juice can increase the levels of sertraline in your blood by slowing down how your body breaks it down. This can increase the risk of side effects. While the effect is usually modest, it is often advised to avoid drinking large amounts of grapefruit juice.

Taking multiple medicines? Our Medicines Interaction Checker helps you check whether your prescriptions, over-the-counter medicines, and supplements are safe to take together. Simply search for your medicines to see potential interactions and what to do about them.

Disclaimer

This information is for general educational purposes only and should not be relied upon as a substitute for professional medical advice. Always consult your GP, pharmacist, or another qualified healthcare professional before making decisions about your medications. Individual circumstances may vary, and only a healthcare professional who knows your medical history can provide personalised guidance.