Amphetamine is a racemic mixture of d-amphetamine and l-amphetamine. The d-isomer is more potent in its CNS effects. The l-isomer has a longer elimination half-life and is more potent than the d-isomer in its cardiovascular effects. For a clear summary of the differences between dextroamphetamine and levoamphetamine, click HERE.
Short-acting (4 to 6 hours) amphetamine preparations
Mixed amphetamine salts (generic, Adderall®). See Mixed amphetamine salts (Adderall® or Adderall XR®)
Dextroamphetamine (generic, Dexedrine® tablets, Zenzedi®). Dextroamphetamine is the more active dextro- isomer contained in the racemic amphetamine. See Dextroamphetamine (Dexedrine®): Basic Information
Amphetamine (Evekeo®). This is the racemic amphetamine, i.e., a mixture of d-amphetamine and l-amphetamine.
Special formulations of short-acting preparations
Dextroamphetamine oral solution (ProCentra®)
Medium-acting (about 8 hours) amphetamine preparations
Mixed amphetamine salts extended-release (Adderall XR® and generic)
Dextroamphetamine sustained-release (Dexedrine® Spansules). See Dextroamphetamine (Dexedrine®): Basic Information
Special formulations of medium-acting preparations
Amphetamine extended-release oral suspension (Dyanavel XR®, Adzenys ER®). This is an oral liquid containing an extended-release of amphetamine for once daily use. See Amphetamine (Dynavel-XR®) extended-release oral suspension: Basic information
Amphetamine extended-release orally disintegrating tablets (Adzenys XR-ODT®). See Amphetamine extended-release orally disintegrating tablets (Adzenys XR-ODT®)
Longest-acting (12 hours or longer) amphetamine preparations
Lisdexamfetamine (Vyvanse®). See Lisdexamfetamine (Vyvanse®): Basic Information
“Mixed salts of a single-entity amphetamine product” (Mydayis®). This is a triple-bead preparation of mixed amphetamine salts. See Mixed salts of a single-entity amphetamine product (Mydayis®): Basic information and Triple-bead preparation of mixed amphetamine salts (Mydayis®)
Special formulations of the longest-acting preparations
Lisdexamfetamine chewable tablets (Vyvanse® chewable tablets)
ADHD medications: General topics
Combining stimulants and other medications
Last revised October 4, 2022.
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