Splenic marginal-zone lymphoid depletion and thymic involution at high dose in rats
“In all HD animals, hepatocellular hypertrophy, foamy alveolar macrophages, epithelial vacuolation in the seminal vesicle, vacuolation and lymphoid depletion of the marginal zone in the spleen, cortical hypertrophy of the adrenals, decreased hematopoietic tissue in the bone marrow, and thymic involution were also observed”
✓ VerifiedFDA pharmacology/toxicology review, p. 31Source ↗
Biodistribution & persistence
Crosses blood-brain barrier (brain:plasma ~3); highest concentrations in urinary bladder and uveal tract
“Distribution studies (with [14C]lasmiditan) in rat show that lasmiditan crosses the blood brain barrier, with brain to plasma ratios of approximately 3 over a 24-hour period after IV dosing. The highest concentrations of [14C]lasmiditan were found in the urinary bladder and uveal tract of the eye.”
✓ VerifiedFDA pharmacology/toxicology review, p. 19Source ↗
Modality-specific risk
Potential for coronary artery vasoconstriction
“In addition, the sponsor conducted nonclinical studies to address concerns regarding the potential for lasmiditan to cause coronary artery vasoconstriction.”
✓ VerifiedFDA pharmacology/toxicology review, p. 4Source ↗