Semax

Russian ACTH(4-10)-derived heptapeptide studied as a fast-acting nootropic and BDNF elevator.

Semax is a Russian-developed fragment of the ACTH hormone, stripped of its hormonal action so only the brain effects remain. It's a genuine prescription drug there — for stroke recovery, cognitive complaints, and attention — and works largely by raising BDNF, the protein that helps neurons grow and form new connections. Users describe a clean lift in focus, verbal fluency, and mental stamina without the jittery edge of stimulants. It's taken intranasally so it reaches the brain quickly, with effects inside an hour.