TGJB Wrote:
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> Clenbuterol, not bute.

True. Testing my Google skills --

Bute, short for phenylbutazone, is probably the most widely used drug in horses. Bute is an inexpensive, highly effective treatment for inflammation and pain that can be injected intravenously or given orally to horses as a powder or paste. Bute works by inhibiting a class of enzymes called cyclo-oxygenases, COX for short. Activation of this system is a necessary step in the complex chain of events that results in inflammation.