<unk>  is readily absorbed from the gastrointestinal tract and metabolized in the liver. Its time to peak plasma concentration is 1.5–2 hours. The plasma elimination half-life is fairly quick at 3–4 hours which can contribute to not detecting<unk>  intoxication. The metabolite half-life is 16 hours.<unk> 's excretion is primarily through the kidneys, with about 70% being excreted over 3 days. Only about 5% is excreted as unchanged<unk> . Drug testing of racehorse urine has led to the revelation that among<unk>  equine metabolites are both pemoline and aminorex, stimulants that are forbidden by racing authorities. Further testing confirmed aminorex in human and canine urine, meaning that both humans and dogs also metabolize<unk>  into aminorex., though it is unclear whether plasma aminorex is present at any appreciable<unk> el. Blood samples following oral administration of<unk>  out to 172 hr post-dose did not demonstrate any plasma aminorex<unk> els above that of the limit of quantification (LoQ). Additionally, in cocaine-positive plasma samples, of which 42% contained<unk> , aminorex was never reported at concentrations higher than LoQ.
Levamisole
Dimetacrine
Avermectin
Pyrantel
Ivermectin
Silver sulfadiazine
Piretanide
Salicylic acid