What are three pharmacological characteristics that distinguish morphine from cocaine?

What will be an ideal response?

Morphine: reduces wakefulness and alertness; is an agonist at enkephalin receptors; can induce very uncomfortable withdrawal following chronic use; induces effects blocked by opiate antagonists; has potent analgesic properties; induces respiratory depression; induces constipation; constricts pupils. Cocaine: enhances wakefulness and alertness; blocks dopamine reuptake; induces no severe withdrawal following chronic use; effects not blocked by opiate antagonists; has little or no analgesic qualities—although it can act as a local anesthetic; induces no respiratory depression or constipation; dilates pupils.