About 7 out of 10 patients experienced some symptom relief, researchers found.Half said their chronic pain diminished, 18 percent said they slept better, nerve pain improved in 15 percent, and anxiety was quelled in 10 percent.

Three-fourths of the people treated had been diagnosed with chronic pain, Mechtler said. Other conditions included cancer (6 percent), neuropathy (5 percent), multiple sclerosis (5 percent), epilepsy (3 percent) and Parkinson’s disease (2 percent).

After adjustments in dose, only 21 percent continued to have side effects. Ultimately, 3 percent of participants stopped taking medical marijuana due to side effects.