For individuals suffering from pain and physical ailments, CBD can be one of the best choices for helping you fall asleep. Through several recent studies, CBD has been shown to help alleviate symptoms of PTSD, MS, inflammation, muscular and joint dysfunction, and of course, insomnia. This is because CBD can help to relieve pain, which can prove to be a serious inhibitor of sleep. CBD can be taken as a pill or through inhaling, which is sometimes a more effective way of inducing a restful state. However, pills can act more quickly on the brain than inhalation methods, which is a consideration for those seeking a faster cure for insomnia from CBD.
 N. M. Kogan, E. Melamed, E. Wasserman, B. Raphael, A. Breuer, K. S. Stok, R. Sondergaard, A. V. Escudero, S. Baraghithy, M. Attar-Namdar, S. Friedlander-Barenboim, N. Mathavan, H. Isaksson, R. Mechoulam, R. Müller, A. Bajayo, Y. Gabet, and I. Bab, “Cannabidiol, A Major Nonpsychotropic Cannabis Constituent, Enhances Fracture Healing and Stimulates Lysyl Hydroxylase Activity in Osteoblasts,” Journal of Mineral and Bone Research 30, no. 10 (October 2015): 1905–1913.
Serotonin is a neurotransmitter that affects mood, social behavior, sleep, memory, appetite, and sexual function. It is believed that anxiety and depression occur when the brain isn’t properly using serotonin. 5-HT1A is a subtype of serotonin receptor, and CBD oil enhances 5-HT1A transmission. This allows for your brain to make use of the serotonin in the synaptic space, instead of it just going back into the brain. This is what makes CBD oil regulate your mood and reduce anxiety.
Several studies assessed CBD using contextual fear conditioning. Briefly, this paradigm involves pairing a neutral context, the conditioned stimulus (CS), with an aversive unconditioned stimulus (US), a mild foot shock. After repeated pairings, the subject learns that the CS predicts the US, and subsequent CS presentation elicits freezing and other physiological responses. Systemic administration of CBD prior to CS re-exposure reduced conditioned cardiovascular responses , an effect reproduced by microinjection of CBD into the BNST, and partially mediated by 5-HT1AR activation . Similarly, CBD in the prelimbic cortex reduced conditioned freezing , an effect prevented by 5-HT1AR blockade . By contrast, CBD microinjection in the infralimbic cortex enhanced conditioned freezing . Finally, El Batsh et al.  reported that repeated CBD doses over 21 days, that is chronic as opposed to acute treatment, facilitated conditioned freezing. In this study, CBD was administered prior to conditioning rather than prior to re-exposure as in acute studies, thus further directly comparable studies are required.
In the United States, non-FDA approved CBD products are classified as Schedule I drugs under the Controlled Substances Act. This means that production, distribution, and possession of non-FDA approved CBD products is illegal under federal law. In addition, in 2016 the Drug Enforcement Administration added "marijuana extracts" to the list of Schedule I drugs, which it defined as "an extract containing one or more cannabinoids that has been derived from any plant of the genus Cannabis, other than the separated resin (whether crude or purified) obtained from the plant." Previously, CBD had simply been considered "marijuana", which is a Schedule I drug.