Symptoms: Initially irritability, agitation, disorientation and tremor may occur, followed by cardiac arrhythmias, convulsions, hallucinations and coma.
Treatment: The stomach should be emptied by emesis or stomach tube and washed out with water if the preparation has been ingested within the last three or four hours. Diazepam, preferably by mouth (cautiously by intravenous injection) should be used to control marked excitement and convulsions. Provided renal function is adequate, elimination of phentermine may be assisted by acidification of the urine by agents such as lysine hydrochloride or arginine hydrochloride.
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