Section 520.1242c - Levamisol and piperazine(a)Specifications.(1) Each ounce of solution contains 0.36 gram of levamisole hydrochloride and piperazine dihydrochloride equivalent to 3.98 grams of piperazine base.(2) A soluble powder which when constituted with water contains in each fluid ounce 0.45 gram of levamisole hydrochloride and piperazine dihydrochloride equivalent to 5.0 grams of piperazine base.(b)Sponsor. See No. 054771 in § 510.600(c) of this chapter.(c)Conditions of use in horses -(1)Amount. Aqueous solution: administer by stomach tube or drench 1 fluid ounce per 100 pounds of body weight. Reconstituted soluble powder: administer by stomach tube 1 fluid ounce per 125 pounds of body weight. If reinfection occurs, re-treat animals at 6- to 8-week intervals.(2)Indications for use. An anthelmintic effective against infections of large strongyles (Strongylus vulgaris, S. edentatus), small strongyles (Cylicocercus spp., Cylicocyclus spp., Cylicodontophorus spp., Cylicostephanus spp., Cylicotetrapedon spp.), ascarids (Parascaris equorum), and pinworms (Oxyuris equi).(3)Limitations. Do not use in horses intended for human consumption. Federal law restricts this drug to use by or on the order of a licensed veterinarian. 78 FR 28823 , May 20, 2014