I’ve got a shelf full of expired pills, mostly sedatives and some antibiotics, but none of them are specifically designed for cellular regeneration. Some older compounds—like certain beta‑blockers or even a few antihistamines—can influence cell signaling, but I’ve never seen them used for planarian regrowth. If you’re serious, you’d be better off looking at current research on growth factors or small‑molecule modulators, not my dusty catalog.

Will keep an eye out. My shelves are a maze of forgotten pills, so I’ll alert you if I find a curious capsule that looks like it could double as a regenerative booster—though I doubt it will outshine the current literature.