Can you take Wegovy with depression?

Jump to: Understanding depression and weight | Wegovy and mental health safety | Medication interactions | Foods to focus on | Physical activity | Mental health during weight loss | When to speak to your GP | Frequently asked questions | Take home message

You can take Wegovy if you have depression. There’s no direct interaction between semaglutide and common antidepressants. Your body breaks them down using different enzymes, so they don’t interfere with each other.

A post-hoc analysis of the STEP clinical trials found that participants taking antidepressants lost comparable amounts of weight on semaglutide. In STEP 1, those on antidepressants lost an average of 15.7% of their body weight.¹

Depression and obesity each increase the risk of the other. A meta-analysis of 15 longitudinal studies found that people living with obesity had a 55% higher risk of developing depression, and people with depression had a 58% higher risk of developing obesity.²

Understanding the link between depression and weight

Depression and obesity each increase the risk of the other, through both physical and emotional pathways.

Depression can reduce motivation to exercise, disrupt sleep, and increase cravings for high-calorie foods.

Chronic stress and depression also raise cortisol levels, which promote fat storage around the abdomen.

Excess weight causes a low level of inflammation throughout the body, which can affect the brain chemicals that influence mood.

Many people living with obesity also face weight stigma from others, which on its own raises the risk of depression.

Some antidepressants cause weight gain as a side effect, which makes managing weight harder while treating depression.

Mirtazapine, for example, commonly causes weight gain and increased appetite because it blocks the brain signals that normally tell us we’ve had enough to eat.

Clinical studies report average gains of around 2 kg in the first six weeks of treatment.

Tricyclic antidepressants like amitriptyline can also cause weight gain. This creates a cycle where treating one condition can worsen the other.

SSRIs such as sertraline and citalopram are generally considered weight-neutral in the short term, though some people may experience modest weight changes over longer periods.

Wegovy and mental health safety

In 2023, reports of suicidal thoughts in people taking GLP-1 receptor agonists (a class of weight loss medications that mimic gut hormones) prompted safety reviews by the European Medicines Agency, the UK’s MHRA, and the US Food and Drug Administration.

The EMA completed its review in April 2024 and concluded that available evidence doesn’t support a causal link between GLP-1 receptor agonists and suicidal thoughts or self-harm.³

The MHRA reached the same conclusion in September 2024. It found no evidence to establish a causal relationship between GLP-1 receptor agonists and suicidal behaviour, suicidal ideation, self-injury, or depression.³

In January 2026, the FDA published the largest review to date, analysing 91 placebo-controlled GLP-1 trials covering 107,910 patients alongside a real-world cohort study of 2.2 million patients.

It found no increased risk of suicidal ideation or behaviour and formally requested that the suicidal ideation warning be removed from Wegovy, Saxenda, and Zepbound labels in the U.S.⁴

A separate analysis published in JAMA Internal Medicine examined depression scores (using the PHQ-9 questionnaire) and suicidal ideation across the STEP 1, 2, 3, and 5 trials over up to 104 weeks. It found no clinically meaningful differences between semaglutide and placebo on these measures.⁵

If you have a history of depression or suicidal thoughts, it’s still sensible to monitor your mental health closely when starting Wegovy. This is good practice when starting any new medication, not something specific to semaglutide.

Medication interactions

Semaglutide is broken down by enzymes that digest proteins, not by the liver enzymes (cytochrome P450 system) that process most medications.

Common antidepressants are processed through these liver enzymes, so there’s no direct interaction.

The Wegovy SmPC doesn’t list any clinically relevant interactions with antidepressant medications, but some side effects overlap between the two.

SSRIs (sertraline, citalopram, fluoxetine, escitalopram)

SSRIs are the most commonly prescribed antidepressants in the UK. They work by increasing serotonin availability in the brain.

Both SSRIs and Wegovy can cause nausea, particularly in the early weeks.

If you’re already settled on an SSRI, the nausea from Wegovy’s dose increases usually settles within a few weeks at each dose level.

SNRIs (venlafaxine, duloxetine)

Like SSRIs, SNRIs can cause nausea and appetite changes. Duloxetine is also prescribed for chronic pain conditions, which often coexist with depression.

The main practical consideration is managing overlapping gastrointestinal side effects during the Wegovy dose increases.

Mirtazapine

Mirtazapine commonly causes weight gain and increased appetite because it can blocks the signals to the brain that tell it we’ve eat enough.

For people who’ve gained weight on mirtazapine, Wegovy may help counteract this effect.

If you’re considering switching antidepressants because of weight gain, discuss this with your GP first.

Stopping antidepressants suddenly can cause discontinuation symptoms (dizziness, flu-like symptoms, mood disturbance) and a return of depression.

Tricyclics and bupropion

Older tricyclics like amitriptyline can cause weight gain, constipation, and drowsiness, with overlapping gastrointestinal effects when combined with Wegovy.

Bupropion is associated with weight loss rather than gain. In the UK, it’s mainly available as Zyban for smoking cessation rather than as an antidepressant. Neither has a direct interaction with semaglutide.

Overlapping side effects

The table below summarises side effects that are common to both Wegovy and antidepressants.

Foods to focus on

What you eat can directly affect depressive symptoms. The SMILES trial was the first randomised controlled trial to test whether dietary changes could treat clinical depression.⁶

Participants were assigned to either a modified Mediterranean diet or a social support group.

After 12 weeks, the dietary group showed significantly greater improvement in depressive symptoms. Around a third of those in the dietary group achieved remission, compared to 8% in the support group.⁶

Mediterranean-style eating pattern

The SMILES trial diet emphasised vegetables, fruits, complex carbohydrates, legumes, nuts, olive oil, and moderate amounts of fish. It also limited refined cereals, sweets, fried food, processed meat, and sugary drinks.⁶

In practice, this means building meals around vegetables and legumes, using olive oil as your main cooking fat, and including fish two to three times a week.

The same pattern can be built using foods from any cuisine, as long as it’s anchored in whole foods, fibre, healthy fats, and adequate protein. A healthy diet isn’t restricted to the Mediterranean.

Complex carbohydrates like rolled oats, brown rice, sweet potatoes, wholegrain or sourdough bread, and beans and lentils are rich in fibre and release energy more slowly. This helps avoid the blood sugar spikes and crashes that can affect mood.

Omega-3 fatty acids

A meta-analysis of 26 studies involving over 2,000 participants found that omega-3 supplementation significantly reduced depressive symptoms.

EPA-dominant formulations (≥60% EPA) showed the strongest evidence, at doses of up to 1 g per day.⁷

The likely mechanism is that EPA reduces inflammation, which is consistently elevated in people with depression.

Food sources of EPA include oily fish like salmon, mackerel, sardines, and anchovies. Two to three portions of oily fish per week is a practical target.

Tryptophan-rich foods

It’s a common misconception that eating tryptophan-rich foods like turkey, chicken, and eggs boosts serotonin in the brain and improves mood, but the research doesn’t fully support this widespread belief.

Tryptophan is an amino acid the body uses to make serotonin, a brain chemical that helps regulate mood.

But tryptophan doesn’t just ‘enter’ the brain freely. It has to compete with several other amino acids for the same doorway.

When you eat a protein-rich meal, you take in a lot of those competing amino acids alongside the tryptophan, so brain tryptophan levels often don’t rise much, and can even fall slightly after a meal.

This doesn’t mean protein is unimportant. Adequate protein helps maintain muscle mass during weight loss on Wegovy, supports steady energy, and helps you feel full.

But the idea that eating turkey or eggs directly raises brain serotonin simply isn’t true.

The dietary patterns with the strongest evidence for supporting mood, mainly those based on whole foods, omega-3 from oily fish, and plenty of fibre and fermented foods, work in other ways, such as reducing inflammation and supporting gut health (more on the gut-brain link below).

The gut-brain axis

Around 90% of the body’s serotonin is produced by cells in the gut.

Although this gut serotonin doesn’t cross the blood-brain barrier, gut bacteria can influence mood through the vagus nerve and through chemical messengers that do reach the brain.

Fermented foods like yoghurt, kefir, sauerkraut, and kimchi contain beneficial bacteria that support gut health. High-fibre foods like oats, beans, lentils, and vegetables feed these bacteria.

Wegovy slows stomach emptying, which can change your gut environment. Eating enough fibre and fermented foods helps maintain a healthy gut while taking the medication.

Foods to limit

Alcohol is a central nervous system depressant that can worsen depression symptoms and interact with most antidepressants. It can also increase nausea and dehydration when combined with Wegovy.

Ultra-processed foods, sugary snacks, and refined carbohydrates are associated with poorer mental health outcomes in observational studies.

Reducing these while increasing whole-food intake aligns with evidence from the SMILES trial.⁶

Managing reduced appetite on Wegovy

Depression can reduce appetite, and Wegovy further reduces it. This combination means you need to be intentional about eating enough nutritious food, even when you don’t feel hungry.

We recommend basing your meals on nutrient-dense whole foods to ensure you’re providing your body with everything it needs to function well.

Prioritise protein at each meal: eggs, fish, chicken, Greek yoghurt, and legumes all help maintain muscle mass during weight loss.

Include healthy fats from olive oil, nuts, and avocado to support energy and brain function.

If you’re struggling to eat enough, aim for foods that are easier to digest, like smoothies, scrambled eggs, or soups, stews, and casseroles that have cooked for a long time so the food is soft.

Physical activity

A 2026 Cochrane review of 73 randomised controlled trials involving nearly 5,000 adults found that exercise produces a moderate reduction in depressive symptoms, with effects comparable to psychological therapy.

Comparisons with antidepressant medication suggested a similar effect, although this was based on a small number of studies and rated as low certainty.⁸

The review found that completing 13 to 36 sessions of light-to-moderate-intensity exercise was associated with the greatest improvements.

No single type of exercise was clearly superior, although mixed exercise programmes and resistance training appeared slightly more effective than aerobic exercise alone.⁸

Starting when motivation is low

Depression can make starting anything feel extremely challenging.

The most important thing isn’t what type of exercise you do, but that you do something small enough to actually manage, even on bad days.

A 10-minute walk after a meal is a practical starting point. Linking a new behaviour to something you already do, like walking to the shops or getting off the bus one stop early, removes the need for motivation-dependent decisions.¹⁰

Research on habit formation shows that on average it takes 66 days for a new behaviour to become automatic.¹⁰

Aerobic exercise

Walking, swimming, cycling, and jogging all have evidence supporting their effectiveness in reducing depressive symptoms.

Any movement is better than none, and building a small, consistent habit matters more than hitting a specific target. Gradually do a little more as it feels manageable.

Resistance training

Resistance training has shown specific benefits for depression in clinical trials, beyond its general fitness effects.

It also helps preserve muscle mass during weight loss on Wegovy, which is important because muscle loss can contribute to fatigue.

Bodyweight exercises like squats, press-ups, and lunges at home are a practical way to start. Even one or two short sessions a week can help, and you can build from there.

Exercise and antidepressants together

Exercise doesn’t replace antidepressant medication. In practice, combining medication, exercise, and dietary improvement is likely to be more effective than any single approach alone.

Mental health during weight loss

Weight loss, even when wanted, can affect mood in unexpected ways.

Rapid body changes, shifts in how people treat you, and changes to eating patterns can all trigger emotional responses that aren’t straightforwardly positive.

Keep a simple mood log, even just a daily score out of ten, to spot trends early.

Share this with your GP or prescriber at review appointments. This gives both of you objective information rather than relying on memory.

Weight stigma

Many people living with depression and obesity have experienced weight stigma from healthcare professionals, family, or the public. This stigma is itself a well-documented risk factor for worsening depression.

Losing weight doesn’t automatically resolve the psychological effects of years of stigma.

If past experiences with weight-related judgment are affecting your mental health, talking therapy can help address them directly.

People may treat you differently as you lose weight. This can be a positive experience for some, but upsetting for others who realise how poorly they were treated before they lost weight.

Body image during rapid weight change

Wegovy can cause significant weight loss, and your mental image of yourself may not keep pace with physical changes.

Loose skin, changing clothing sizes, and seeing yourself differently in the mirror can all contribute to body image difficulties during rapid weight loss.

If this is causing distress, it’s worth discussing with a therapist or counsellor.

Additionally, we recommend that our members lose weight at a sustainable rate of around 1lb per week.

Losing weight gradually reduces the risk of future regain, helps to protect muscle mass, and may allow for a more gradual change in our appearance, which may reduce the challenge in adapting to the physical changes we experience during weight loss.

The role of weight loss expectations

Some people expect that losing weight will resolve their depression. The reality is more complicated.

Depression has many contributing factors. Genetics, childhood experiences, trauma, chronic stress, relationships, work, sleep, physical health, hormonal changes, and life circumstances can all play a part.

Weight and weight-related stigma can be one contributing factor among many, but they’re rarely the whole picture.

Losing weight may improve mood for some people, particularly if weight-related health problems or stigma were significant factors for them.

For others, losing weight may not lead to any changes in their mood, because the root causes of their depression lie elsewhere.

If your mood doesn’t improve as you’d hoped after losing weight, this isn’t a personal failing.

It’s a sign that depression needs direct treatment in its own right, whether that’s talking therapy, medication, or both, alongside the support you’re getting for weight management.

Support resources

If you need mental health support, these services are available:

• NHS Talking Therapies (formerly IAPT): free talking therapy for depression and anxiety. Self-referral, no GP needed, though waiting times vary by area. Find your local service at nhs.uk
• Mind: information and support at mind.org.uk or call 0300 123 3393
• Samaritans: available 24/7 on 116 123 or at samaritans.org

When to speak to your GP

Contact your GP or prescriber if you experience any of the following while taking Wegovy:

• Worsening depression symptoms or a return of symptoms that had been controlled
• New or worsening anxiety
• Suicidal thoughts or thoughts of self-harm
• Significant changes in sleep, appetite, or energy beyond what’s expected from Wegovy
• Persistent nausea or vomiting that prevents you from eating adequately
• Feeling unable to cope with daily activities
• Concerns about interactions between your antidepressant and Wegovy

If you’re in crisis, call Samaritans on 116 123, go to A&E, or call 999.

Frequently asked questions

Does Wegovy cause depression?

The EMA, MHRA, and FDA have all reviewed this question and found no evidence that GLP-1 receptor agonists cause depression or suicidal thoughts.

The FDA’s January 2026 review covered over 100,000 patients across 91 trials and resulted in a request to remove suicidal ideation warnings from Wegovy’s label.³⁴

Any significant life change, including rapid weight loss, can affect mood, so it’s still sensible to monitor how you’re feeling and speak to your GP if you notice changes.

Can weight loss improve depression?

It can, but it’s not guaranteed. The link between obesity and depression means that reducing weight can improve mood for some people, particularly if weight-related health problems or stigma were contributing factors.²

Depression often requires treatment in its own right, regardless of weight changes.

Will Wegovy interact with my antidepressant?

There are no direct drug interactions between semaglutide and common antidepressants, including SSRIs, SNRIs, mirtazapine, and tricyclics.

They’re processed through different pathways in the body. The main consideration is overlapping side effects, such as nausea, which tend to settle over time.

Is Wegovy effective if you’re on antidepressants?

Yes. A post-hoc analysis of the STEP clinical trials found that people taking antidepressants lost comparable amounts of weight on semaglutide to those not taking antidepressants.

In STEP 1, participants on antidepressants lost an average of 15.7% of their body weight.¹

Can I take Wegovy with sertraline?

Yes. Sertraline is an SSRI, and there’s no pharmacological interaction with semaglutide.

Both can cause nausea, so you may experience more gastrointestinal symptoms during the initial weeks, but this typically settles as your body adjusts to Wegovy.

Should I tell my prescriber about my antidepressant before starting Wegovy?

Always disclose all medications you’re taking, including antidepressants, supplements, and over-the-counter medicines.

While there are no direct interactions, your prescriber needs a complete picture to monitor you safely.

Will Wegovy affect my appetite differently because I have depression?

Depression can either increase or decrease appetite depending on the person. Wegovy reduces appetite in most people.

If depression already suppresses your appetite, you’ll need to be especially mindful about eating enough nutritious food to meet your body’s needs.

Can I drink alcohol while taking Wegovy and antidepressants?

Alcohol is a central nervous system depressant that can worsen depression and interact with most antidepressants.

Wegovy can also increase sensitivity to alcohol and worsen nausea. If you do drink, keep it minimal and discuss safe limits with your GP.

What diet is best for depression?

A diet based on whole foods, prioritising vegetables, fruits, complex carbohydrates, meat, dairy, legumes, oily fish, nuts, and extra-virgin olive oil, has the strongest evidence.

The SMILES trial used a modified Mediterranean diet built on these foundations and found that around a third of participants achieved remission from major depression after 12 weeks.⁶ The same eating pattern can be built using foods from any cuisine.

Does exercise help with depression?

Yes. A 2026 Cochrane review found that exercise produces a moderate reduction in depressive symptoms, with effects comparable to psychological therapy.⁸

Will mirtazapine make it harder to lose weight on Wegovy?

Mirtazapine commonly causes weight gain and increased appetite, which may make weight loss more challenging on Wegovy.

However, the STEP trial data suggests semaglutide is still effective in people on antidepressants.¹

Discuss with your GP whether mirtazapine is still the best antidepressant for you if weight management is a priority.

Take home message

You can take Wegovy if you have depression. There are no direct drug interactions between semaglutide and common antidepressants, and clinical trial data show Wegovy is equally effective in people taking antidepressants.¹

The EMA, MHRA, and FDA have all reviewed the safety data and found no causal link between GLP-1 receptor agonists and depression or suicidal thoughts.

The FDA’s January 2026 review of over 100,000 patients led to a formal request to remove suicidal ideation warnings from Wegovy’s label.³⁴

A diet based on whole foods, regular physical activity, and psychological support all have strong evidence for supporting both weight loss and mood.⁶⁸

For depression specifically, lifestyle changes can be part of treatment alongside medication, not just an add-on.

Second Nature’s programme combines medication support with personalised nutrition and lifestyle guidance from registered dietitians and nutritionists.

The programme is built around a balanced plate model: half vegetables, quarter protein, quarter complex carbohydrates, plus a serving of healthy fat.

A peer-reviewed study published in JMIR Formative Research found that participants on Second Nature’s semaglutide-supported programme lost an average of 17.1% of their body weight at 12 months.⁹

References

1. Kushner, R.F. et al. (2024). Efficacy and safety of semaglutide 2.4 mg according to antidepressant use at baseline: a post hoc subgroup analysis. Obesity, 32(2), 273-280.
2. Luppino, F.S. et al. (2010). Overweight, obesity, and depression: a systematic review and meta-analysis of longitudinal studies. Archives of General Psychiatry, 67(3), 220-229.
3. MHRA. (2024). MHRA finds evidence does not support a link between GLP-1 receptor agonists and suicidal and self-injurious thoughts and actions.
4. US Food and Drug Administration. (2026). FDA requests removal of suicidal behavior and ideation warning from glucagon-like peptide-1 receptor agonist (GLP-1 RA) medications.
5. Wadden, T.A. et al. (2024). Psychiatric safety of semaglutide for weight management in people without known major psychopathology: post hoc analysis of the STEP 1, 2, 3, and 5 trials. JAMA Internal Medicine, 184(11), 1290-1300.
6. Jacka, F.N. et al. (2017). A randomised controlled trial of dietary improvement for adults with major depression (the ‘SMILES’ trial). BMC Medicine, 15, 23.
7. Liao, Y. et al. (2019). Efficacy of omega-3 PUFAs in depression: a meta-analysis. Translational Psychiatry, 9, 190.
8. Clegg, A.J. et al. (2026). Exercise for depression. Cochrane Database of Systematic Reviews, 1, CD004366.
9. Richards, R. et al. (2025). Semaglutide and tirzepatide in a remote weight management program: 12-month retrospective observational study. JMIR Formative Research, 9, e81912.
10. Lally, P. et al. (2010). How are habits formed: modelling habit formation in the real world. European Journal of Social Psychology, 40(6), 998-1009.