My Husband Purchased A Herbal Supplement Because Of Overactive Bladder.

My husband purchased a herbal supplement because of overactive bladder. Its main ingredient is Angelica 100mg. He has Parkinsons Disease and take several medication for it. He also is diabetic, has high blood pressure, non alcoholic liver disease and angina for which he takes meds for with the exception of meds for liver disease. Is it safe for him to take it? Recommended dose is 1 tablet a day.