Best Supplements to Take with Fluoxetine (and Which Ones to Avoid)
Quick Answer
Yes, most people can safely take supplements while taking fluoxetine (Prozac).
Fluoxetine isn't known to cause vitamin or mineral deficiencies. However, some supplements can interact with fluoxetine or increase the risk of side effects, so it's important to choose them carefully. Many people also look for supplements to support their overall wellbeing, energy, focus or sleep alongside their prescribed treatment.
That doesn't mean everyone taking fluoxetine needs supplements. The right choice depends on your symptoms, diet, lifestyle, overall health and any other medicines you're taking.
In this guide, we'll explain:
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Which supplements may be worth considering.
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Which supplements should be avoided or used with caution.
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How to choose high-quality supplements that complement a healthy lifestyle.
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When it's worth speaking to your GP or pharmacist.
Pharmacist's Verdict
| Question | Answer |
|---|---|
| Can I take supplements with fluoxetine (Prozac)? | ✅ Yes, in most cases. |
| Does fluoxetine cause vitamin deficiencies? | ❌ Not routinely. |
| Are there supplements that may support overall wellbeing? | ✅ Yes, depending on your individual needs. |
| Are there supplements that should be avoided? | ✅ Yes — some supplements can interact with fluoxetine and should be used with caution. |
Where Should You Start?
If you're taking fluoxetine (Prozac), it's important to choose supplements that support your overall health without increasing the risk of interactions. In most cases, the focus should be on maintaining a balanced diet and only using supplements that meet a genuine nutritional or wellbeing need.
| Supplement | When to consider it | Why? |
|---|---|---|
| High-quality multivitamin | If you're looking for general nutritional support | Helps support your daily intake of essential vitamins and minerals. |
| Functional mushrooms | If you're looking to support focus, cognitive performance or everyday wellbeing | Lion's mane, cordyceps and chaga are commonly used as part of a healthy lifestyle. |
| Magnesium | If your dietary intake is low | Magnesium contributes to normal psychological function, normal nervous system function and the reduction of tiredness and fatigue. |
| Omega-3 | If you don't regularly eat oily fish | Supports normal heart function and forms part of a balanced diet. |
| Vitamin D | If you have limited sun exposure or are at risk of deficiency | Supports normal immune function, muscle function and bone health. |
In the next section, we'll look at these supplements in more detail, explain who may benefit from them and highlight the supplements that are best avoided while taking fluoxetine.
Supplements That May Be Worth Considering
Functional Mushrooms
Many people taking fluoxetine are looking for ways to support their focus, cognitive performance and overall wellbeing. Functional mushrooms such as lion's mane, cordyceps and chaga are increasingly popular for this purpose.
While they aren't a treatment for depression or anxiety, they may be a useful addition to a healthy lifestyle for some people.
(MYCO Morning contains organic lion's mane, cordyceps and chaga mushroom extracts, with no fillers or unnecessary additives.)
A High-Quality Multivitamin
If you're looking for general nutritional support, a well-formulated multivitamin can help support your daily intake of essential vitamins and minerals. Choose one that uses bioavailable nutrient forms and avoids unnecessary fillers.
(TRINITY is pharmacist formulated, uses bioavailable nutrient forms and separates nutrients across Morning, Day and Night formulations.)
Magnesium
Magnesium isn't routinely recommended because you're taking fluoxetine, but it may be worth considering if your dietary intake is low or you're looking to support normal psychological function and nervous system function.
(Magnesium Complex contains magnesium bisglycinate and magnesium taurate with no magnesium oxide.)
Omega-3
If you don't regularly eat oily fish, an omega-3 supplement may be worth considering. It contributes to normal heart function and can help support a balanced diet.
Vitamin D
Vitamin D deficiency is common in the UK. If you have limited sun exposure, have previously been advised your levels are low or are at increased risk of deficiency, supplementation may be appropriate.
Supplements to Avoid (or Use with Caution)
Most supplements can be taken safely with fluoxetine (Prozac). However, some can interact with fluoxetine by increasing serotonin levels or affecting how the medicine works.
| Supplement | Recommendation | Why? |
|---|---|---|
| St John's wort | ⛔ Avoid | St John's wort can increase serotonin levels and should not be taken with fluoxetine due to the risk of serotonin syndrome. |
| 5-HTP | ⛔ Avoid | 5-HTP increases serotonin production and isn't recommended alongside fluoxetine. |
| L-Tryptophan | ⚠️ Avoid unless advised | L-tryptophan may increase serotonin levels and shouldn't routinely be combined with fluoxetine. |
| Mood support supplements containing multiple active ingredients | ⚠️ Check the label | Some products contain serotonin-boosting ingredients that may not be suitable to take with SSRIs. |
If you're thinking about taking a supplement for mood, anxiety or stress, speak to your GP or pharmacist first. Choosing supplements that support your general health is usually a safer approach than combining fluoxetine with products designed to alter serotonin levels.
When Is It Worth Seeking Advice?
Most people can take supplements safely alongside fluoxetine (Prozac). However, it's worth speaking to your GP or pharmacist if:
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You're considering a supplement marketed for mood, anxiety or depression.
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You're taking several supplements alongside fluoxetine.
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You've noticed new or worsening side effects after starting a supplement.
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You're pregnant, breastfeeding or planning a pregnancy.
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You have liver disease or another long-term medical condition.
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You're taking other medicines that affect serotonin levels.
If you develop symptoms such as agitation, confusion, muscle stiffness, tremors, a high temperature or severe diarrhoea after combining fluoxetine with another medicine or supplement, seek urgent medical attention, as these may be signs of serotonin syndrome.
Your healthcare professional can help you choose supplements that support your overall health while reducing the risk of interactions with fluoxetine.
Frequently Asked Questions
Can I take supplements with fluoxetine?
Yes. Most supplements can be taken safely with fluoxetine. However, supplements that increase serotonin levels should generally be avoided unless advised by your healthcare professional.
What are the best supplements to take with fluoxetine?
A high-quality multivitamin, functional mushrooms, magnesium, omega-3 and vitamin D may be worth considering depending on your diet, lifestyle and overall health goals.
Can I take functional mushrooms with fluoxetine?
Yes. There are no well-established interactions between fluoxetine and functional mushrooms such as lion's mane, cordyceps or chaga. They aren't a treatment for depression or anxiety, but some people choose to take them to support focus, cognitive performance and overall wellbeing.
Can I take magnesium with fluoxetine?
Yes. Magnesium can generally be taken safely with fluoxetine. It may be appropriate if your dietary intake is low or you're looking to support normal psychological function, normal nervous system function and the reduction of tiredness and fatigue.
Can I take omega-3 with fluoxetine?
Yes. Omega-3 supplements can generally be taken safely with fluoxetine and may be worth considering if you don't regularly eat oily fish.
Can I take St John's wort with fluoxetine?
No. St John's wort should not be taken with fluoxetine because it can increase serotonin levels and raise the risk of serotonin syndrome.
Can I take 5-HTP with fluoxetine?
No. 5-HTP isn't recommended alongside fluoxetine because it may increase serotonin levels and increase the risk of serotonin syndrome.
Can I take vitamin D with fluoxetine?
Yes. Vitamin D can generally be taken safely with fluoxetine and may be appropriate if you have low vitamin D levels or an increased risk of deficiency.
Should I stop taking fluoxetine if I want to take supplements?
No. Continue taking fluoxetine exactly as prescribed. If you're unsure whether a supplement is suitable, speak to your GP or pharmacist before starting it rather than stopping your medication.
