The main chemical that makes people feel high when using cannabis is called tetrahydrocannabinol, or THC
The Multi-Log Dosing Window : A landmark study investigating Achilles tendon healing in rats demonstrated that the therapeutic benefit, measured by improved biomechanical strength and functional recovery, was statistically equivalent across doses spanning six orders of magnitude: from 10 micrograms per kilogram (mcg/kg) down to 10 picograms per kilogram (pg/kg) [4]
198 Quintana-CabreraR.QuirinC.GlytsouC.CorradoM.UrbaniA.PellattieroA.et al (2018)
And compounders can generally make custom drugs for patients with a doctor's prescription as they do for patients with allergies to certain preservatives in medications, for example
Colpo GD, Venna VR, McCullough LD, Teixeira AL
If you miss a scheduled injection, follow your providers instructions carefully