Bring the bottle—or a photo of every label
Include vitamins, herbs, powders, gummies, and over-the-counter medicines. Note the amount you actually take and how often. Share the list with your clinician and pharmacist.
Check interactions first
- Blood thinners: Vitamin K affects warfarin. CoQ10 can also interact with warfarin. Review any new product before starting it.
- Heart medicines: St. John’s wort can reduce the effectiveness of some medicines.
- Kidney disease or potassium-raising medicines: Review electrolyte supplements and salt substitutes.
- Upcoming procedure: Tell the procedure team about all supplements. Follow their specific instructions about which products to pause and when; do not stop prescribed blood thinners on your own.
Quality testing has limits
Independent testing seals, such as USP or NSF, can help assess ingredients and contamination. They do not prove that a supplement benefits your heart or is safe for your particular situation.
Ask your care team
- Do I have a deficiency or another clear reason to take this?
- What outcome could it improve, and how strong is the evidence?
- Is it compatible with my medicines and kidney function?
- What amount and duration are appropriate for me?
- Do I need blood tests or other monitoring?
- What side effects should prompt me to call?
Call 911 for chest pressure with sweating or breathlessness, severe breathing difficulty, or fainting with ongoing symptoms. For new or worsening palpitations, dizziness, or a suspected supplement reaction, contact your care team promptly. Do not delay urgent care while trying to correct an electrolyte level yourself.
Evidence reviewed October 2026. Educational information; your own care plan may differ.