Another common side effect that hemp oil can cause in supplement users involves the cardiac system and bloodstream. As the PeaceHealth website states, hemp oil products can directly affect the anticoagulant properties of platelets within the blood, often inhibiting their very production. As a result, patients who are currently being treated for a blood clotting deficiency or other cardiac medical condition are strongly advised to stay away from hemp oil supplements of any kind due to possible symptom complications.
Cannabis has psychoactive and physiological effects when consumed. The immediate desired effects from consuming cannabis include relaxation and euphoria (the "high" or "stoned" feeling), a general alteration of conscious perception, increased awareness of sensation, increased libido and distortions in the perception of time and space. At higher doses, effects can include altered body image, auditory and/or visual illusions, pseudohallucinations and ataxia from selective impairment of polysynaptic reflexes. In some cases, cannabis can lead to dissociative states such as depersonalization and derealization.
Update January 1st, 2017: The recent news stories of the DEA placing hemp based CBD as a schedule one substance have to do with marijuana, and accounting codes, not the above precedents, ie HIA v. DEA 2004, and the 2014 Farm Bill which already exclude hemp based cannabinoids from DEA regulation making whole plant hemp based cannabis oil legal when produced in accordance with state hemp program guidelines. See noted cannabis attorney Bob Hoban's excellent blog post here for more details on this latest development.
When used as treatment for pain, CBD has a powerful effect on neuropathic pain, which is pain of the nerves and might be caused by peripheral nerve injury or other factors. By activating CB2 receptors, CBD activates many of the pathways that ease pain, and this goes a long way towards managing long term conditions such as diabetes, MS, and fibromyalgia.