Not known Incorrect Statements About Cannabis Law & Employee Rights - Sharp Law Firm, P.A. Medical cannabis is legal for clients with the list below conditions: Amyotrophic lateral sclerosis (ALS), or Lou Gehrig's disease, Cancer, Crohn's disease, Epilepsy, Glaucoma, HIV/AIDSMultiple sclerosis (MS)Parkinson's disease, Post-traumatic tension condition (PTSD)