What species of animals are being treated regularly with white willow bark?
Mainly dogs are treated. The herb can be toxic to cats due to its significant content of salicylates. As with aspirin, white willow bark should be used in cats only in small amounts. Aspirin and white willow bark may be used in cats at risk for thromboemboli (clots) secondary to cardiac disease. How much research has been conducted on this supplement? Most of the experience in dogs is based on clinical experience rather than well-conducted research. Two studies in 2000 confirmed a clinical benefit of willow bark in the relief of pain in small animals. How safe is white willow bark? It is safe in dogs when used as directed but poses potential toxicity when used in cats. It should only be used under veterinary supervision in pets as it could conceivably aggravate the side effects of related medications, including non-steroidal anti-inflammatory drugs (NSAIDS) such as aspirin. Where do I obtain white willow bark and do I need a prescription? Your veterinarian may have preferred supplement
