Can I take Ashwagandha and Vitamin B complex together?
Drug interaction guide
Originally published 25 Jan 2026
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There are no known harmful interactions between ashwagandha and Vitamin B complex. In fact, they are often taken together to help manage stress and energy levels.
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Why this happens
Ashwagandha is an adaptogenic herb that helps the body manage stress, while Vitamin B complex supports energy metabolism and nervous system function. They work through different pathways in the body and do not interfere with how the other is absorbed, broken down, or used.
What you should do
Back to contentsIt is generally safe to take these together. However, always follow the dosage instructions on the product labels. If you have an underlying medical condition (such as a thyroid disorder or autoimmune disease), it is best to consult your GP or a pharmacist before starting ashwagandha.
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Important precautions
Back to contentsPregnancy
Do not use ashwagandha during pregnancy as it may have abortifacient effects (it could cause a miscarriage).
Autoimmune diseases (e.g., Lupus, Rheumatoid Arthritis, Multiple Sclerosis)
Ashwagandha can stimulate the immune system, which may worsen the symptoms of autoimmune conditions.
Hyperthyroidism (overactive thyroid)
Ashwagandha can increase thyroid hormone levels. You must avoid it if you have an overactive thyroid, as it may worsen your condition or interfere with thyroid medications.
Scheduled Surgery
Stop taking ashwagandha at least 2 weeks before surgery; it can slow down the central nervous system and may dangerously increase the effect of anaesthesia.
Food and drink warnings
Back to contentsAlcohol
Ashwagandha has sedative properties and may enhance the effects of alcohol. Combining them can lead to excessive drowsiness, impaired coordination, and slowed reaction times. It is best to avoid or strictly limit alcohol while taking this supplement.
Dairy products
While dairy is a good source of B vitamins, taking a B complex supplement with a very large amount of dairy may slightly alter the absorption rate of Riboflavin (B2). However, for most people, taking them together is acceptable unless specified by a doctor.
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Using other medicines
Back to contentsTaking 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.
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Article history
The information on this page is written and peer reviewed by qualified clinicians.
25 Jan 2026 | Originally published
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