Hepatic No adjustment for mild-moderate impairment; closely monitor severe impairment
Instructions
Take with or without food
First-dose 6-hour cardiac monitoring (hourly pulse/BP; ECG before and after) at initiation, at reinitiation after >14-day interruption, and with pediatric dose increases
Observe overnight if higher risk of symptomatic bradycardia, heart block, prolonged QTc, or on drugs with torsades risk
Available strengths
cap 0.25, 0.5 mg
Contraindications
Within prior 6 months: MI, unstable angina, stroke, TIA, decompensated HF requiring hospitalization, or Class III/IV HF
History of Mobitz II 2nd-degree or 3rd-degree AV block or sick sinus syndrome, unless a pacemaker is present
Baseline QTc ≥500 msec
Cardiac arrhythmias requiring Class Ia or Class III antiarrhythmic drugs
Cautions
Bradyarrhythmia and AV block (first-dose)
Infections, incl. PML, cryptococcal, and herpes viral infections
Pregnancy May cause fetal harm; registry data suggest increased major birth defects. Stop 2 months before conception; use effective contraception during and for 2 months after.
Lactation No human data; present in rat milk. Weigh developmental/health benefits of breastfeeding against maternal need.