Help With Taking Vitamins After Clarithromycin
In our latest question and answer, the pharmacist discusses concerns taking vitamins after dosing with clarithromycin.
I take 100 mg of clarithromycin daily. Then I don’t eat anything for 2 hours. After those 2 hours, is it safe to take my vitamin supplements?
Jan 10, 2026- Clarithromycin is safe to take with vitamins and minerals, unlike some other antibiotics that can be affected by these supplements.
- You can take regular vitamins two hours after clarithromycin without interfering with how well the antibiotic works.
- Herbal supplements like St. John's Wort should be avoided while taking clarithromycin because they can make the antibiotic less effective.
Hello!
Thanks for reaching out with your question. It’s always smart to check what’s safe to take with antibiotics, since some antibiotics can be greatly affected by food, vitamins, or supplements.
For example, certain antibiotic classes like fluoroquinolones (such as ciprofloxacin or levofloxacin) and tetracyclines (such as doxycycline) should not be taken at the same time as minerals like calcium, magnesium, iron, or zinc. These minerals can stick to the antibiotic (known as chelation) and prevent your body from absorbing it properly.
The good news is that clarithromycin (the active ingredient in Biaxin) does not have this problem with vitamins, minerals or food.
The FDA approved prescribing information for clarithromycin states the following:
BIAXIN [clarithromycin] tablets and oral suspension can be taken with or without food and can be taken with milk; however, BIAXIN XL tablets should be taken with food.
Detailed studies looking at how clarithromycin is absorbed by the body show:
- Immediate-release clarithromycin: Food may slow absorption slightly, but it does not reduce how much of the medication your body absorbs.
- Extended-release clarithromycin (Biaxin XL): Taking it with food actually helps your body absorb the medication better, which is why it should always be taken with food.
Because of this:
- Immediate-release clarithromycin can be taken with or without meals.
- Extended-release clarithromycin should be taken with food.
So, putting all this together to answer your question directly: yes, it is safe to take your vitamin supplements two hours after taking clarithromycin, and this timing should not interfere with how the antibiotic works.
I do want to point out that this applies to standard vitamin supplements, such as multivitamins or individual vitamins and minerals. The word “supplements” can include many different products, and some herbal or specialty supplements have not been well studied for drug interactions.
For example, herbal products like St. John’s Wort can interfere with clarithromycin by speeding up how the body breaks it down. This can lower antibiotic levels and make it less effective. Because of this, St. John’s Wort should generally be avoided while taking clarithromycin.
If your vitamins contain any herbals or anything outside typical vitamins and minerals, be sure to talk to your healthcare provider before combining with clarithromycin.
Final Words
In summary, immediate-release clarithromycin is safe to take with food and with vitamin products, and taking vitamins two hours later is completely fine.
For herbal supplements or non-vitamin products, it’s best to check with your doctor or pharmacist so they can review any possible interactions and give you personalized advice.
As a final note, you mentioned taking a dose of 100 mg of clarithromycin. For adults, this is an unusually low dose for most common infections, although there can be exceptions depending on the situation.
I don’t have access to your age or prescribing details, so I can’t say whether this dose is appropriate for you specifically. However, if the dose was entered incorrectly in your message, or if you have any questions or concerns about your clarithromycin dose, please let us know and we’d be happy to help with any follow-up questions.
References & sources
Glossary — Terms in This Answer
- Fluoroquinolones
- A class of antibiotics commonly used to treat bacterial infections, including drugs like ciprofloxacin and levofloxacin.
- Tetracyclines
- A class of antibiotics, such as doxycycline, that are effective against various bacterial infections.
- Chelation
- A process where minerals chemically bind to a medication and prevent the body from absorbing it properly.
- Clarithromycin
- An antibiotic medication (the active ingredient in Biaxin) used to treat bacterial infections.
- FDA approved prescribing information
- Official, government-reviewed instructions from the drug manufacturer that describe how a medication should be used safely and effectively.
- Extended-release
- A form of medication designed to release the active ingredient slowly over time rather than all at once.
- Herbal products
- Supplements made from plants or plant extracts that can sometimes interfere with how medications work in the body.
- Drug interactions
- Unwanted effects that occur when two or more substances (like medications and supplements) are taken together and affect how each other works.
Dr. Brian Staiger, PharmD
Doctor of Pharmacy, board certified clinical pharmacist (BCPS), American Herbalist Guild, Medication Therapy Management certified
Brian Staiger, PharmD, BCPS, is a licensed pharmacist with more than 13 years of experience across retail pharmacy, clinical pharmacy, medication safety, pharmacy program development, and healthcare administration. He is the founder of HelloPharmacist.com, where he helps patients...
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