Supplements are easier to stop than prescription medicines, so the first step when something seems wrong is usually simple: stop the supplement and see whether the problem resolves. The harder question is when stopping is not enough.
Common side effects reported with this supplement or ingredient
Mild digestive effects, a metallic taste, or a headache in the first days of a new supplement usually settle or resolve on stopping. If they do, no appointment is needed, though it is worth mentioning at your next contact if you are on other medicines.
Effects that do not settle after stopping, or that are worsening rather than easing, need looking at.
Possible interactions with medicines, chronic conditions or pregnancy
See someone promptly, rather than waiting, if you take prescription medicines and started a supplement recently. An interaction may show up as your existing treatment working less well rather than as a new symptom, which is easy to miss. See supplement and medicine interactions.
If you are pregnant, breastfeeding, or have kidney or liver disease, the threshold for asking should be lower.
Who should speak to a healthcare professional before using it?
Anyone taking a supplement to treat a symptom rather than as general cover. Persistent tiredness, hair loss, digestive trouble or low mood all have causes worth identifying, and a supplement can delay that by making the problem tolerable without resolving it.
Dose, product-quality and stacking risks
Take the actual products with you rather than a list from memory. Labels carry the strengths, the full ingredient list and the batch number, and a pharmacist can work out totals across several products far faster with the packs in front of them. See taking too many supplements.
When to stop and get medical advice
Emergency care now:
- Difficulty breathing, or swelling of the face, lips or throat
- Chest pain, fainting, or a racing or irregular heartbeat
- Bleeding that will not stop, or vomiting blood
- Agitation or confusion with fever, sweating and muscle twitching
- Seizures, or severe abdominal pain
- Any suspected overdose in a child, particularly involving iron
Same day, because these can be quiet until they are not:
- Liver signs: yellowing of the eyes or skin, dark urine, pale stools, persistent nausea, unusual tiredness, or pain under the right ribs. Several supplements including high-dose turmeric and green tea extract have been associated with liver injury. See supplements causing liver problems.
- Kidney signs: passing much less urine than usual, or marked swelling of the legs
- Unexplained bruising, or a rash that blisters or peels
- New numbness or tingling in the hands or feet
- Marked thirst with frequent urination
The liver and kidney signs are the ones worth memorising, because they develop gradually and are easy to attribute to being run down rather than to something you are taking.
Whatever you do about a supplement, do not stop a prescribed medicine on the same reasoning.
Related supplement safety guides
- Supplement side effects
- Supplement and medicine interactions
- Taking too many supplements
- Unsafe supplements in South Africa
- Report a supplement side effect
Medical Disclaimer: This content is for informational and educational purposes only and does not constitute medical diagnosis, prescription, or professional advice. Always read the patient information leaflet and consult a qualified doctor or pharmacist regarding any medicine or health concern.