Insights into Pathophysiology from Medication-induced Tremor.

Area of Science:

• Neurology
• Pharmacology

Background:

• Medication-induced tremor (MIT) is a frequent clinical observation.
• Numerous medications can precipitate or worsen tremors.
• MIT often arises from enhanced physiological tremor (EPT), but alternative mechanisms exist.

Purpose of the Study:

• To review how common instances of MIT illuminate tremor pathophysiology.
• To explore the mechanisms underlying medication-induced tremors.

Main Methods:

• A PubMed literature search was conducted.
• Articles focusing on the mechanisms of medication-induced tremor were identified.

Main Results:

• Literature on MIT mechanisms is limited, often focusing on frequency and clinical context.
• MIT involves multiple drug-specific mechanisms.
• Management of MIT typically requires an individualized patient approach.

Conclusions:

• MIT offers insights into general tremor mechanisms.
• While often linked to EPT, MIT mechanisms vary, involving peripheral (e.g., epinephrine) and central pathways (e.g., amitriptyline).
• Other mechanisms include dopamine receptor blockade and secondary effects like hyperthyroidism (e.g., amiodarone).