Heterobasidiomycetes, including the jelly, rust and smut fungi; Previously the entire Basidiomycota were called Basidiomycetes, an invalid class level name coined in 1959 as a counterpart to the Ascomycetes, when neither of these taxa were recognized as divisions.
Too much of anything is bad is general rule of thumb. I found several articles which favour eating peppermint and detail side effects of over consumption. But in general there are some side effects of eating altoids and other mint gums. Mouth sores, headaches, stomach burns are few of them. Check out following links for more information. peppermint: Uses, Side Effects, Interactions and Warnings.
Over the counter medications are generally safe but they all have side effects and can interact with other medications that you are already taking. NSAIDS, or non-steroidal anti-inflammatory drugs, are one of the most effective treatments for arthritis. They help to relieve pain and swelling. However, they can cause stomach upset and sometimes can lead to ulcers. It is important to always take this class of medication with food.