Tangentially related: doxycycline helps improve muscle and tendon tear recovery by enhancing the performance of matrix proteins that form "scaffolding", by inhibiting factors that break them down. "By inhibiting MMPs, doxycycline helps preserve and remodel the ECM, accelerating repair and improving biomechanical strength (e.g., tensile strength and reduced creep/strain)". Crazy. I'm a big fan off high-ROI off-label uses of well-tolerated, cheap, out-of-patent "WHO essential medecines list" pharmas. There's much to be found there.

Another tidbit: inderol (propranolol, beta-blocker) can aide PTSD recovery by reducing the emotional potency of traumatic memories when taken in a therapeutic replay.