If your symptoms persist or worsen, or you experience side effects, consult your health care provider.
Side effects of witch hazel taken orallyorallyto be taken by mouth (swallowed) include nausea, vomiting, constipation, and stomach upset. Taking it by mouth at high doses can result in liver and kidney damage. People with liver and kidney disorders should use oral witch hazel with caution.
Witch hazel is likely safe when used externally, although topical witch hazel can cause skin rash, redness, or burning.
Witch hazel may lower your blood sugar levels and therefore should be used with caution if you have diabetes or are taking diabetic medications. You may need to monitor your blood sugar more often.
Do not use witch hazel if you are:
- allergic to witch hazel
- allergic to Compositae plants (e.g. arnica, chamomile)
Women who are pregnant or breast-feeding should not use any form of witch hazel due to lack of safety studies in these populations. Topical witch hazel should only be used by people 2 years and older.
Before taking any new medications, including natural health products, speak to your physician, pharmacist, or other health care provider. Tell your health care provider about any natural health products you may be taking.