Natural Medicines Comprehensive Database rates effectiveness based on scientific evidence according to the following scale: Effective, Likely Effective, Possibly Effective, Possibly Ineffective, Likely Ineffective, Ineffective, and Insufficient Evidence to Rate.
The effectiveness ratings for OREGANO are as follows:
Insufficient evidence to rate effectiveness for…
- Parasites in the intestines. Some early research shows that taking 200 mg of a specific oregano leaf oil product (ADP, Biotics Research Corporation, Rosenberg, Texas) by mouth three times daily with meals for 6 weeks can kill certain types of parasites; however, these parasites usually do not require medical treatment.
- Wound healing. Early research suggests that applying an oregano extract to the skin twice daily for up to 14 days after a minor skin surgery might reduce the risk of infection and improve scars.
- Athlete’s foot.
- Bleeding disorders.
- Heart conditions.
- High cholesterol.
- Indigestion and bloating.
- Muscle and joint pain.
- Painful menstrual periods.
- Urinary tract infections (UTI).
- Varicose veins.
- Other conditions.
More evidence is needed to rate oregano for these uses.
Special precautions & warnings:
Pregnancy and breast-feeding: Oregano is POSSIBLY UNSAFE when taken by mouth in medicinal amounts during pregnancy. There is concern that taking oregano in amounts larger than food amounts might cause miscarriage. There is not enough reliable information about the safety of taking oregano if you are breast feeding. Stay on the safe side and avoid use.
Bleeding disorders: Oregano might increase the risk of bleeding in people with bleeding disorders.
Allergies: Oregano can cause reactions in people allergic to Lamiaceae family plants, including basil, hyssop, lavender, marjoram, mint, and sage.
Diabetes: Oregano might lower blood sugar levels. People with diabetes should use oregano cautiously.
Surgery: Oregano might increase the risk of bleeding. People who use oregano should stop 2 weeks before surgery.
Interaction with medication
- Medications for diabetes (Antidiabetes drugs)
- Oregano might decrease blood sugar. Diabetes medications are used to lower blood sugar. In theory, taking some medications for diabetes along with oregano might cause your blood sugar to go too low. Monitor your blood sugar closely. The dose of your diabetes medication might need to be changed.
Some medications used for diabetes include glimepiride (Amaryl), glyburide (DiaBeta, Glynase PresTab, Micronase), insulin, metformin (Glucophage), pioglitazone (Actos), rosiglitazone (Avandia), and others..
- Medications that slow blood clotting (Anticoagulant / Antiplatelet drugs)
- Oregano might slow blood clotting. In theory, taking oregano along with medications that also slow clotting might increase the chances of bruising and bleeding.
Some medications that slow blood clotting include aspirin, clopidogrel (Plavix), dabigatran (Pradaxa), dalteparin (Fragmin), enoxaparin (Lovenox), heparin, warfarin (Coumadin), and others..