I also am not aware of any, however it contains a number of herbs that could each potentially have side effects or interfere with other medicines.
According to the manufacturer, the capsules contain: ClearLungs Extra Strength Herbal Blend (750 mg/cap):Dong Quai root, Ophiopogon root, Poria fungal body, Chinese Asparagus root, Chinese Skullcap root, Gardenia fruit, Luo Han Guo fruit, Platycodon root, Tangerine mature peel, White Mulberry root bark, Zhejiang Fritillary bulb, Schisandra fruit, Chinese Licorice root, Availablend Bioavailability Complex Sichuan Pepper, Ginger root, Black Pepper, Habanero Pepper, Vegetable capsule, microcrystalline cellulose, silica.

The quantities do not seem to be specified (which if often typical in Chinese herbal medicines.)

When I am recommended an herbal medicine, I look up each ingredient and its potential side effects, then I look for any interaction with each medication I take. For example, here is what WebMD has to say about long term use of dong quai, which is just one ingredient: "Taking dong quai in higher doses for more than 6 months is possibly unsafe. Dong quai contains chemicals that might cause cancer." (https://www.webmd.com/vitamins/ai/ingredientmono-936/dong-quai)

Just something to consider when using any supplement or drug ...
Sue

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