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* Phenytoin is a drug used for seizures. Herbal interactions to be aware of include ginkgo biloba, white willow, lemon balm, skull cap, kava kava, and valerian root, to name a few. It is also important to know that Folate supplementation is necessary with Phenytoin, but excess Folate can be harmful.
* It’s important to take calcium supplements and vitamin D two hours apart from taking either Phenytoin or Digoxin in order to not interfere with these drug’s effects.
Of particular concern are interactions with
herb St. John’s Wort, which is taken by 7.5 million Americans as a depression remedy. This herb can cause serious consequences when taken with drugs such as Prozac, Zoloft, or Paxil, as well as warfarin, cyclosporine, and oral contraceptives. This herb may also interact with Digoxin, chemotherapy drugs, and other drugs, causing treatment failure. Some of these interactions are serious enough that if St. John’s Wort were a drug,
government would restrict marketing, make it a prescription-only item, or require label warnings.
So, what can one do??
Anyone taking a dietary supplement should first do their homework. Know exactly what
purpose of a particular supplement is for and learn all known interactions. There are many excellent informational websites on
internet. A good rule of thumb is to look for a site that does not offer products for sale!
It’s also important to inform your healthcare professional what supplements you are taking, in order to avoid potential supplement-drug interactions that could put you at medical risk. Although many credible professionals sell products, there are just as many who sell products but don’t really understand
physiology of
human body and are just out to make money. Supplement sales is a very popular ‘easy’ way to make money today!
It’s just as important to do one’s homework when looking for a complementary care practitioner. Although this is only one set of criteria,
best recommendation is to look for one or any of these: A pharmacist or registered dietitian who is educated in medicinal herbs, a physician who specializes in functional medicine, or an MD, OD, ND, DC, PharmD or RD who also has
CCN credential.
Don’t be afraid to take supplements. They serve a very beneficial purpose. But do know why you’re taking each supplement, just as you should know why you take any prescription medications. Be an informed consumer and take responsibility for your health and wellbeing.

Marjorie Geiser has been teaching health, fitness and nutrition since 1982. She is a nutritionist, registered dietitian, certified personal trainer and life coach. As the owner of MEG Fitness, Marjorie’s goal for her clients is to help them incorporate healthy eating and fitness into their busy lives. To learn more about the services Margie offers, go to her website at www.megfit.com or email her at Margie@megfit.com