Mostly these:

Swanson Peppermint Oil Combination 100 Sgels https://www.amazon.com/dp/B00068UC22/ref=cm_sw_r_apan_glt_fabc_MSKSGXS6PTGW2354Z95A?_encoding=UTF8&psc=1

I have also used these and they worked pretty well:

NOW Supplements, Peppermint Gels with Ginger & Fennel Oils, Enteric Coated, Digestive Support*, 90 Softgels https://www.amazon.com/dp/B000JN883Y/ref=cm_sw_r_apan_glt_fabc_RK201AS53DT2G0Y8SPH6?_encoding=UTF8&psc=1

I also find this tea helpful for mild episodes:

Lipton Soothe Your Tummy Herbal Supplement Tea Bags For a Soothing Hot Beverage Ginger Peppermint and Fennel Caffeine Free Tea Blend 15 Count, Pack of 4 https://www.amazon.com/dp/B076BXJ9FS/ref=cm_sw_r_apan_glt_fabc_1E57H7A9HYF8KKJY4KQF