*Surgery: Arnica might cause extra bleeding during and after surgery. Stop using it at least 2 weeks before a scheduled surgery.
* Medications that slow blood clotting (Anticoagulant / Antiplatelet drugs) interacts with arnica.
==The Health benefits and uses of Arnica are==
Arnica has been used to help the healing of many conditions:
Sixty-nine patients (87%) rated the tolerability of the gel as "good" or "fairly good," and 76% would use it again. Topical application of Arnica montana gel for 6 weeks was a safe, well-tolerated, and effective treatment of mild to moderate OA of the knee.
[[Category:Treatments]]
[[Category:herbal medicine]]
[[Category:Homeopathy]]