The overdose-reversal drug Naloxone is available without a prescription at most CVS and Walgreens pharmacies. It’s legal to carry it, and having some on hand could help you save a life.

Naloxone comes in two formulations: an intramuscular injector and a nasal spray. That means reversing an overdose is as simple as jabbing a needle into someone’s arm, thigh, or buttocks or squirting the drug up the person’s nose.

Signs of an overdose include nonresponsiveness, cold and clammy skin, and shallow or stopped breathing. You could be a hero simply by buying Naloxone.

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