Side Effects and Cautions

• Peppermint oil appears to be safe for most adults when used in small doses. Possible side effects include allergic reactions and heartburn.
• Capsules containing peppermint oil are often coated to reduce the likelihood of heartburn. If they are taken at the same time as medicines such as antacids, this coating can break down more quickly and increase the risk of heartburn and nausea.
• Tell your health care providers about any complementary and alternative practices you use. Give them a full picture of what you do to manage your health. This will help ensure coordinated and safe care.