<unk>  is a glucosylceramide synthase inhibitor that is FDA approved for the treatment of adult patients with Gaucher disease type 1 who are CYP2D6 extensive metabolizers (EMs), intermediate metabolizers (IMs), or poor metabolizers (PMs) as detected by an FDA-cleared test.   Common adverse reactions include fatigue, headache, nausea, diarrhea, back pain, pain in extremities, and upper abdominal pain.
Eliglustat
Miglustat
Migalastat
Azelastine 
Pemirolast
Plerixafor
Olaflur
Cromolyn 