This is an over the counter product - it does not require prescription.Joint Relief is used as pet’s age as an aid to reduce lameness, stiffness, difficulty rising and pain with movement. Active Ingredient(s) Arnica M., Rhus Tox., Hypericum, Calendula O., Ham. V., Lathyrus S., Acon. Dosage: Use this product once in the morning, evening and bedtime directly into the mouth or in water. For pets less than 20 lbs give 5 drops, for pets 20 to 100 lbs give 10 drops and for pets over 100 lbs give 15 drops