Respo-K™ is a safe, non-addictive, FDA-registered 100% natural homeopathic OTC medicine formulated especially for pets to relieve colds and respiratory ailments and strengthen immunity to prevent the recurrence of secondary infections of the sinuses or lungs. Respo-K™ is an excellent companion to homeopathic AmazaPet™, as it improves respiratory function and reduces asthmatic symptoms in pets. Used together, Respo-K™ and AmazaPet™ can provide immediate symptomatic relief of respiratory infections and asthma in pets for easy breathing by improving overall respiratory health and lung functioning! All PetAlive® homeopathic products and biochemic tissue salts are manufactured in a FDA- and cGMP-registered pharmaceutical facility under the supervision of qualified homeopaths and responsible pharmacists. Individual ingredients are listed in the Homeopathic Pharmacopoeia of the United States (HPUS).