Can You Take Mounjaro With Sertraline? (November 2026)

01 · The short answer

Can you take Mounjaro and sertraline together?

Many people ask this because they take sertraline for low mood or anxiety and are also struggling with weight. The honest answer is that it depends on your whole picture, and the person who should decide is a prescriber who can see it. Our consultation is free, and every order is reviewed by a GPhC-registered prescriber, so your medicines are checked before anything is dispensed.

Your prescriber or pharmacist can read the Mounjaro patient leaflet and product information against your own circumstances.¹¹³

If you want a wider view, our guides cover Mounjaro and sertraline together and the broader topic of sertraline and GLP-1 medicines.

02 · Your next step

What to do before you start

03 · Why stomach emptying matters

Why stomach emptying matters for tablets

Tirzepatide activates two gut-hormone receptors, GIP and GLP-1. Together they help regulate appetite, slow how quickly the stomach empties and improve the way the body responds to insulin.¹

Slower stomach emptying is the reason prescribers pay attention to anything you swallow.

Your prescriber and pharmacist can read the product information against your own circumstances. Our related guide on whether Mounjaro affects sertraline goes through the question from that angle.

04 · Telling your prescriber

What to tell the prescriber

The most useful thing you can bring is a complete and accurate list. Include your sertraline, what it is for, how long you have taken it and whether a doctor has recently changed it.

• Every prescription medicine, including anything for sleep, migraine or blood pressure.
• Over-the-counter products and supplements.
• Any history of low mood, anxiety or other mental health conditions, and how well they are controlled at the moment.
• Anything that has recently changed in your treatment.

This helps with other combinations too. See our guides on zopiclone with Mounjaro, sumatriptan with Mounjaro and amlodipine with Mounjaro.

05 · After you start

What to watch for after you start

Everyone begins on 2.5mg once a week, and the starting weeks are about adjustment rather than weight loss.¹ Mild nausea, altered appetite and tiredness in the first days after each injection are the commonest early effects and usually settle.

Because both medicines can affect how you feel, it can be hard to tell which one is responsible for a symptom. Keep a short note of when symptoms happen in relation to your injection day and your tablet. That makes it much easier for the prescriber to help.

Contact your prescriber if you notice a new symptom or if a symptom is not settling. If your mood drops or you have distressing thoughts, seek help promptly and tell your prescriber. Do not adjust either medicine yourself. You can report suspected side effects through the Yellow Card scheme.¹⁹ Our ongoing monthly reviews and side-effect support are there for exactly this. If you have thoughts of harming yourself or ending your life, get help straight away. Call 999 or go to A&E if you are in immediate danger. In England you can call NHS 111 and choose the mental health option, any time. You can also call Samaritans free on 116 123, day or night. Tell your prescriber about any change in your mood while taking Mounjaro.

06 · Mood and weight

Mood, weight and realistic expectations

Low mood can make healthy routines harder to keep. Mounjaro is a tool alongside diet and activity, not a replacement for them.

Progress is gradual by design. Think in months, not days, and judge progress by trend rather than individual weigh-ins. If weight loss is slower than you hoped, that is something to discuss with your prescriber rather than a reason to change doses yourself.

07 · Related guides

Related guides on this topic

Read about taking Mounjaro while on sertraline, the full UK guide to this combination, or our safe-use tips. For the wider picture on treatment, visit our weight loss clinic.

08 · Serious side effects

Serious side effects: when to get help straight away

Serious side effects are uncommon but need urgent attention. Seek immediate medical help for: severe, persistent stomach pain that may spread to your back, with or without vomiting (possible pancreatitis); pain in the upper right abdomen, fever or yellowing of skin/eyes (possible gallbladder problems); or signs of a severe allergic reaction such as swelling of the face or throat and difficulty breathing. If you take insulin or a sulfonylurea alongside Mounjaro, watch for low blood sugar (shakiness, sweating, confusion) — your prescriber may need to adjust those medicines.¹