Absolutely! Just be sure to check with both your Oriental Medicine practitioner, as well as your Western medical doctor. Herbal medicine (since many of them are actually the basis for western drugs) can occasionally have interactions with some pharmaceuticals.
In fact, these modalities can be very complementary to each other. Western drugs, as well as western medical procedures, tend to have one or more side effects, which you can offset naturally with herbs.
For example, I usually use Oriental Medicine (acupuncture, herbs, etc.) for most of my medical needs. However, I needed surgery for a bone issue with my foot. However, after this very western medical procedure, I used herbs and acupuncture to heal much faster and more completely than I would have otherwise.
Just be sure to rely upon a licensed medical professional in the field of Oriental Medicine, certified by the NCCAOM (National Certification Commission for Acupuncture and Oriental Medicine). Herbal medicine is potent medicine and you need to have a qualified Acupuncture Physician to prescribe them properly for you.
See www.nccaom.org/about/index.html.