Comprehensive. Convenient. Compassionate.
A Division of Pomona Valley Hospital Medical Center
Comprehensive. Convenient. Compassionate.
A Division of Pomona Valley Hospital Medical Center

Make Sure Your “Natural” Supplements are Compatible with Your Prescriptions

May 01, 2013

There are many great natural herbal dietary supplements available to you over the counter from health food stores, supermarkets and even your local big box store. When used as directed they are generally safe without serious side effects.

However, herbal supplements contain biologically active compounds and some have been shown to have adverse consequences when taken along with certain prescription drugs.

Here are a couple of examples of some common herbal supplements that are thought to be a problem when mixed with specific prescription drugs:

Ginkgo: Ginkgo has been shown to inhibit the action of platelets in your blood, interfering with blood coagulation. So, you should not take ginkgo if you are currently taking the blood thinner Coumadin (warfarin) or antiplatelet drugs such as Plavix (clopidogrel). Additionally, if you are already taking drugs for diabetes, avoid Ginkgo supplements as they may lower blood sugar.

Garlic: When taken as a supplement, garlic may inhibit blood clotting. Don’t use garlic supplements if you are already taking anticoagulants or antiplatelet drugs. Garlic has also been shown to interfere with the antiviral drug Invirase (saquinavir), which is used to treat HIV infection.

You can also read this recent Johns Hopkins Alert that lists more examples of known prescription drug interactions with herbal supplements.

Something else to be aware of: If you are going in for surgery, some herbal remedies appear to increase the risk of bleeding. Others have been shown to interfere with drugs commonly used before, during, and after surgery, including anesthetics.

So be sure to tell your surgeon if you have been talking any supplements. Plus, it is a good idea to stop taking any dietary supplements at least a week before your scheduled surgery. Doing so will give them time to be cleared through your system.

The bottom line: if you are considering adding a new herbal supplement to your regimen, ask your doctor or pharmacist whether there are known safety problems associated with the supplement, especially negative interactions with other medications you might already be taking. Likewise, when your doctor prescribes a new medication for you, be sure to tell him or her what herbal supplements you are currently taking or may have taken recently.

Even the safest of herbal supplements could have possible side effects when taken with certain prescription drugs. So let us know what you are taking so we can make sure you are not putting yourself at risk.

Coming in to See Your doctor…Bring a List of any Drugs You are Taking

On a related note, drug interactions are always a concern for your doctor, especially if you or family members are seeing specialists in addition to your family physician.  So, we recommend that anytime you see a new doctor take along a list of any prescription drugs or supplements you are already taking. Then review and discuss them with your doctor before adding any new prescriptions.

If you are already taking a variety of prescription drugs from different doctors, we encourage you to make an appointment with your family practitioner to review the drugs you are on to make sure they are all compatible (and that you still need to be taking all of them).

PVHC Locations
From Chino Hills to La Verne

With five locations across Southern California, your best care is closer than you think.
Find a Location Near You.

A Leading Medical Group in Southern California

Explore our PVHC Locations

From Chino Hills to La Verne– we’re here to provide compassionate and expert care for your entire family. With five medical clinics throughout Southern California, your best care is closer than you think.


1770 North Orange Grove Avenue, Suite 101
Pomona, CA 91767
909-469-9494More Information >
Exterior photo of PVHC Chino Hills

Chino Hills

2140 Grand Avenue, Suite 125
Chino Hills, CA 91709
909-630-7875More Information >
Exterior photo of PVHC Chino Hills

Chino Hills Crossroads

3110 Chino Avenue, Suite 150
Chino Hills, CA 91709
909-630-7490More Information >
Exterior photo of PVHC Chino Hills Crossroads


1601 Monte Vista Avenue, Suite 100
Claremont, CA 91711
909-630-7938More Information >
Exterior photo of PVHC Claremont

La Verne

2333 Foothill Blvd. 
La Verne, CA 91750
909-392-6501More Information >
Photo of PVHC La Verne Location

What Our Patients Are Saying

The staff was extremely helpful and courteous, and the facility was clean and comfortable. An overall wonderful experience.

- Jane
I came in for a shoulder injury and was seen right away. The staff was just awesome.
- Megan
My son and I go to PVHC because we really like the care we receive. Even though we live about an hour away, we still prefer this facility over any other.
- Bridgette

Request Your Appointment Today

Call 909-630-7829
Or Use Our Easy Online Request Form
Find Us Online
Need help? Want to schedule an appointment? Call us at (909) 630-7829.
Copyright© 2024 PVHC - All Rights Reserved | Website by Healthcare Success