BOXED WARNING Embryo-fetal toxicity: can cause embryo-fetal death or severe birth defects. Verify pregnancy status within 7 days before initiation; females use effective contraception during and after treatment; males use condoms with pregnant partners or female partners of reproductive potential.
FDA dosing
Population
Start
Target
Max
Advanced basal cell carcinoma
Adults
150 mg QD
150 mg QD until progression or unacceptable toxicity
150 mg QD
Renal No adjustment needed
Hepatic No adjustment needed
Instructions
With or without food; swallow capsules whole - do not open or crush
Missed dose: skip; resume with next scheduled dose
May withhold up to 8 weeks for intolerable adverse reactions until improvement/resolution
Permanently discontinue for SCARs (SJS, TEN, DRESS); interrupt for severe/intolerable musculoskeletal reactions and permanently discontinue if recurrent
Verify pregnancy status within 7 days before initiation
Do not donate blood or blood products during treatment and for 24 months after final dose; males: do not donate semen during and for 3 months after final dose
Cautions
Embryo-fetal toxicity (boxed): female contraception during and for 24 months after final dose; male condom use (even post-vasectomy) during and 3 months after - drug present in semen
Severe cutaneous adverse reactions (SJS, TEN, DRESS), may be life-threatening or fatal - permanently discontinue
Musculoskeletal adverse reactions with CPK elevation (78% of patients; muscle spasms 72%): obtain baseline CPK and creatinine; recheck if muscle symptoms
Premature fusion of the epiphyses reported with pediatric exposure (may progress after discontinuation); not indicated in pediatric patients
No blood donation during treatment and for 24 months after final dose