“Decreases in the B lymphocyte relative percentages and absolute counts were observed in HD males and females at all doses.”
✓ VerifiedFDA pharmacology/toxicology review, p. 9Source ↗
Biodistribution & persistence
Strong melanin binding: high, persistent levels in choroid/RPE, iris and sclera in rats and monkeys
“Substantial distribution into melanin-containing parts of the eye (choroid + retinal pigment epithelium [RPE], iris, sclera) was demonstrated in rats and monkeys, and ocular RIS concentrations remained high for considerable periods after the end of dosing.”
✓ VerifiedFDA pharmacology/toxicology review, p. 6Source ↗
Modality-specific risk
Retinal degeneration in monkeys of unknown mechanism
“The data suggest that retinal effects are seen only in monkeys, the exact mechanism for the delayed type of retinal toxicity being at present unknown”