What are the possible side effects of Oregano (Origanum vulgare)?
Based on historical use, it appears that oregano is well tolerated in recommended doses. However, there are no available reliable clinical trials demonstrating safety or efficacy of a particular dose or for a recommended treatment duration. Oregano may lower blood sugar levels. Caution is advised in patients with diabetes or hypoglycemia, and in those taking drugs, herbs, or supplements that affect blood sugar. Serum glucose levels may need to be monitored by a healthcare provider, and medication adjustments may be necessary.
