4-Unit VALUE PACK of Dr. Christopher"s Respiratory Syrup (4 oz) - Product Information from Dr. Christophers Cap Formulas Description: This is an excellent syrup for asthma, colds and flu, and is very helpful in expelling mucus from the respiratory system. It can be used for sore throats and mucus. This formula is excellent for fighting toxins. Ingredients: Onion Juice, Garlic Juice, Fennel Extract, Nettle Leaf, Mullein Leaf & Chickweed Herb in a base of Apple Cider Vinegar and pure vegetable glycerine.