Can I take supplements while on HRT?

Often, but check first. Whether a supplement suits you depends on its ingredients and dose, your HRT and any other medicines, so give your doctor or pharmacist the full list. Talk to your doctor before taking a herbal remedy for menopause.

• Medicines known to interact with oestrogen include some for epilepsy and some for infections. If you take any of them, your doctor needs to know before you start HRT.
• Herbal remedies sold for menopause, such as St John's wort, might affect other medicines, and there is not enough information to say other herbal remedies are safe with oestrogen.
• Check combined daily doses across products, and keep vitamin B6 from supplements to 10 mg a day or less unless a doctor advises more.

The short answer

Often, but whether a supplement suits you depends on what is in it, the dose, the type of HRT you use and any other medicines you take. Give your doctor or pharmacist the full list, including vitamins and anything bought online, so they can check it against your prescription.

The medicines known to interact with oestrogen include some medicines for epilepsy, such as phenytoin, carbamazepine and phenobarbital, and some medicines for infections, such as rifampicin, rifabutin, nevirapine, efavirenz, ritonavir and nelfinavir. If you take any of those, your doctor needs to know before you start HRT.

Herbal remedies are different

Many herbal products are marketed for menopause. Some, St John's wort among them, might affect other medicines you take, and there is not enough information to say that other herbal remedies are safe to take with oestrogen. They are not tested in the way pharmacy and prescription medicines are, so the absence of a warning on the pack does not mean an interaction has been ruled out.

If you are on HRT and considering a herbal remedy for menopause, talk to your doctor first; a pharmacist can also check for interactions. Taking a herbal product aimed at the same symptoms as your HRT also makes it harder to tell what is working.

Supplements that often come up

Vitamin D. General UK advice for all adults is to consider 10 micrograms (400 IU) a day through autumn and winter, and all year for people who get little sun or have darker skin. HRT does not change that advice.

Calcium. Best from food where possible. If you take a calcium supplement and also take other medicines, a pharmacist can advise on timing, because calcium can reduce how well some medicines are absorbed.

Magnesium and B vitamins. Check combined daily amounts across every product you take, since multivitamins and B-complexes overlap. Keep vitamin B6 from supplements to 10 mg a day or less unless a doctor advises more: 200 mg or more a day can cause loss of feeling in the arms and legs.

When to ask before you start

Ask your GP or pharmacist first if you take any regular prescription medicines alongside HRT, if you have a long-term health condition, if you are considering any herbal remedy, or if a product contains doses well above the daily amounts on the label. A pharmacist can check a supplement against your prescription quickly and without an appointment.

Where this leaves you

HRT does not rule out vitamins and minerals, but it is a reason to check. Keep to ordinary doses, talk to your doctor before any herbal remedy for menopause, and give your doctor or pharmacist the full list of what you take.

Published by: Suggestic Inc, herstack.co.uk. The HerStack editors. 2026-10-02. This page has not been reviewed by a clinician.