A small study from the University of California-San Francisco has found that inhaled cannabis can help reduce pain in patients hospitalized with sickle-cell anemia.<br />According to UPI, vaped marijuana didn't significantly reduce pain in patients who were also being treated with prescription opioid pain relievers.<br />However, the drug did perform better than placebo and did reduce pain in the patients who received it.<br />Likewise, participants who received inhaled cannabis also did not report improved sleep, but did indicate improved mood.<br />Unlike oral and injected cannabinoids, vaporized cannabis doesn't enter the bloodstream or need to be processed by the liver.<br />The researchers, from the University of California-San Francisco, said that characteristic can protect patients with liver damage.