Nalmefene is not available as an over-the-counter drug, may require multiple doses, and does not have a longer duration of action compared to naloxone.
Nalmefene is not approved to be sold as an over-the-counter drug. It may require multiple doses depending on the situation. In comparison with naloxone, nalmefene does not have a longer duration of action and does not remain in the body longer than naloxone.
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