What are the possible side effects of stimulants?
Stimulants may cause side effects. Most side effects are minor and disappear when dosage levels are lowered.
The most common side effects include:
Difficulty falling asleep or staying asleep
Less common side effects include:
Motor tics or verbal tics (sudden, repetitive movements or sounds)
Personality changes, such as appearing “flat” or without emotion
Call your doctor right away if you have any of these symptoms, especially if they are new, become worse, or worry you.
Stimulants may cause other side effects that are not included in the list above. To report any serious adverse effects associated with the use of stimulants, please contact the FDA MedWatch program using the contact information at the bottom of this page. For more information about the risks and side effects for each medication, please see Drugs@FDA.