A patient is brough into the ER presenting with constipation, miosis, euphoria and sedation. The patient is intoxicated with a drug that produces its effects by activating mu-receptors. The substance can be ingested, insufflated, injected or inhaled. Soon after the intoxication phase the patient begins experiencing tachycardia, nausea, diarrhea, dysphoria and anxiety. Which of the following would be the best treatment option for this patient's withdrawal symptoms?
e. none of the above
A. methadone (for heroine withdrawal)
(this multiple choice question has been scrambled)