Since peripheral 5-HT cannot cross the BBB, central serotonin is synthesized from Trp, which is transported through the BBB from blood circulation (170)
Bustillo JR, Chen H, Gasparovic C, Mullins P, Caprihan A, Qualls C, et al
While GLP-1 therapies work through incretin pathways, cagrilintide activates amylin receptors located in key metabolic control centers of the brain[2]
Children: mild to moderate side effects were reported in children in a small pilot study, although authors defined 200mg/kg/day as a well-tolerated dose among children of mean age 5 years (Goin-Kochel 2019)
On the opposing side, PhRMA, the Partnership for Safe Medicines, and the American Pharmacists Association each filed against inclusion of all seven substances, with the Partnership for Safe Medicines specifically flagging reports of Chinese manufacturers who previously produced fentanyl precursors now pivoting into peptide sales