Peppermint Supplement Side Effects

• Peppermint is usually safe when taken in small doses. Just as with any supplements, moderation is key. Peppermint oil can help with digestion and dental care. Menthol, present in peppermint, can help the respiratory tract. Nausea and headaches can often be treated with peppermint oil on the forehead. Stress can be relieved through the refreshing nature of peppermint. As many wonderful effects that peppermint has, one must still be aware of the negative side effects when peppermint is used in excess.
  
  

Side Effects on the Skin

• When peppermint is used on the skin, keep in mind the possibility of several side effects. Peppermint can cause allergic or hypersensitive reactions, skin rashes, hives and sores. In the mouth, ulcers can form. If peppermint is too close to the eyes, it can irritate and cause burning. It should not be put on areas of the face near the eyes.
  
  

Side Effects of Menthol

• Peppermint contains menthol, which has side effects of its own. Menthol, in large doses, can cause breathing difficulties, asthma and mouth sores. Menthol has also been linked to skin bruising or purple spots appearing on the skin. High doses of menthol can also be deadly in some adults. The strong menthol can cause children and infants to choke. In the past, it was sometimes used to treat colic in infants, but it is not recommended anymore.
  
  

Peppermint by Mouth

• Taking peppermint by mouth can cause many side effects as well, such as dizziness, headache and heartburn. It can also cause anal burning, slow heart rate and muscle tremors. In mass doses, it can cause brain damage, muscle weakness and seizure. Burning stomach or stomach upset is another common side effect. This is all possible with over consumption of peppermint and should not be a concern when taken in moderation.
  
  

For Those with Preexisting Conditions

• If one has issues with the gallbladder problems, such as blockage, inflammation or gallstones, peppermint should not be taken. If there are liver problems, peppermint should be avoided until a medical professional says it's okay. Caution should also be taken if you have diabetes or are pregnant. When breast feeding, peppermint can be excreted through breast milk and cause side effects in your infant, so avoid while breast feeding as well. The potential toxicity of the peppermint can cause deadly side effects if there are these preexisting conditions. Consult with a doctor before adding this supplement to your diet.