Medication that relieves pain but also slows respiration

Ans.

Opiates are medications that can be used as painkillers. These are derived from the opium. Opiates reduce pain as they act as CNS (central nervous system) depressants. The CNS is also associated with regulation of heart beat and respiration. Thus, the opiates also slow down the respiration by slow down the CNS.

Hence, the correct answer is 'opiates.'

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