A 32-year-old man is found drowsy with pinpoint pupils and respiratory rate 6/min after injecting heroin. Pulse oximetry shows oxygen saturation 86% on air. What is the most appropriate immediate management?AAdminister oral NaloxoneBGive intravenous Naloxone and support airway and ventilationCGive intramuscular AdrenalineDProvide reassurance and observeEStart IV fluids onlyCheck my answer