This flowering plant has been used for centuries. It is used in gum, toothpaste, mouthwash, and tea. Research supports the effectiveness of peppermint oil to relieve indigestion. Topical application of peppermint oil may relieve tension headaches. Weak evidence regarding peppermint’s effect on postherpetic pain and irritable bowel syndrome.
Attention for Liver Disease: Avoid peppermint oil if you have liver damage or bile duct obstruction. Use peppermint tea in moderate amounts and with caution. Use under medical supervision if taking anti-rejection drugs, such as cyclosporine. Because it appears to interact with cytochrome p-450 metabolized substances (see About Cytochrome P-450 below), do not take peppermint during HCV treatment.
Safety Information: As a tea, it is likely safe when used in moderate amounts. Peppermint oil can be deadly at high doses. Side effects include skin, eye, and digestive tract irr itation. Infants, children, pregnant and breastfeeding women should avoid.
Interactions: Do not use peppermint oil if taking felodipine (Plendil), simvastatin (Zocor), cyclosporine or other anti- rejection medications. Avoid if taking medications that reduce stomach acid. May interact with any cytochrome p-450 metabolized substances (see Cytochrome P-450)
Lab Notes: May alter hormone tests.
Note: Peppermint oil – adults should never exceed 1 gram per kilogram of body weight. Read the safety information as there is a significant difference between peppermint leaf and oil.