Prescription opioid antagonist drugs that block and reverse the effects of opioids that are used for the emergency treatment of a known or suspected overdose (such as morphine or heroin). Except for prefilled auto injection devices, the member's cost share amount, such as deductible, copayment and/or coinsurance, is waived. There is one exception. If the health plan is a Saver high deductible health plan, the overall deductible will still apply to these drugs.