“…Three main active principles derived from cannabis formulate these drugs: dronabinol (Marinol ® ), a synthetic isomer of Δ 9 -THC, nabilone (Cesamet ® ), a synthetic analogue of Δ 9 -THC and nabiximols (Sativex ® ), a 1:1 mix of Δ 9 -THC and CBD [380]. Sativex ® consists of an oral spray approved in some European countries and Canada for the treatment of spasticity and pain relief in MS patients, with mild-to-moderate side effects that occur scarcely in patients [379,380,406,407,408,409,410,411,412,413,414,415,416]. Nevertheless, no trial has shown a slower disease progression in MS patients prescribed with THC-based drugs and, hence, there are still no evidence of its neuroprotective effect in humans [379,417,418].…”