ADAP is part of the Ryan White CARE Act, but it is administered by states. This federal program provides HIV-related prescription drugs to low-income people who are unable to pay for medication because of limited or no healthcare coverage. Because ADAPs are administered by states, each one sets its own eligibility requirements and specific drugs that are provided can vary. Under ACA, ADAP benefits are now considered contributions towards Medicare Part D's True Out of Pocket Spending Limit (TrOOP), which means you get out of the donut hole faster.
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For information on eligibility criteria, contact your state's health department or visit Health Resources and Services Administration.