 Reversing a gray death overdose frequently requires multiple doses of naloxone , whereas a typical overdose of heroin (which is much less potent) typically needs only one dose.
<clarity>  Reversing a gray death overdose frequently requires multiple doses of naloxone , whereas a typical overdose of heroin (which is much less potent) typically needs only one dose.
 Reversing a gray death overdose may require multiple doses of naloxone , whereas a typical overdose of heroin (which is much less potent) typically needs only one dose.