This is an over the counter product - it does not require prescription. Pfizer Animal Health Indications: A palatable liquid vitamin-mineral supplement for dogs and cats containing iron, copper and 5 essential vitamins. Pet Tinic is for use as a daily dietary supplement. Dosage and Administration: Dosage for diet supplement: Puppies and Kittens: Give 1 dropperful (1 ml) per 5 lbs body weight twice a day. Dogs and Cats: Give 1 dropperful (1 ml) per 10 lbs body weight twice a day. Palatable meat-flavored drops is readily accepted and may be placed directly into pet's mouth or poured over food. Guaranteed Analysis: per teaspoon (5 mL/6.385 g): (All values are minimum quantities unless otherwise stated.) Moisture (maximum) 42% Minerals: Iron 12.5 mg Copper 0.2 mg Vitamins: Thiamine 2.0 mg Riboflavin 1.0 mg Niacin 10.0 mg Vitamin B 6 1.0 mg Vitamin B 12 2.1 mcg Ingredients: Corn syrup, water, sucrose, glycerin, beef liver paste, iron proteinate, sodium citrate, caramel color, citric acid, niacinamide, potassium sorbate, cyanocobalamin, thiamine hydrochloride, pyridoxine hydrochloride, riboflavin, cupric sulfate, natural anise flavor, sodium hydroxide. Precaution(s): Store at controlled room temperature 15°-30°C (59°-86°F). Caution(s): For animal use only.