In a study of 268 separate online discussion threads, 25 percent of people said they believed that marijuana was useful. The researchers point out, however, that research proving a connection between marijuana and positive therapeutic outcomes is limited.
Other limited studies have suggested that marijuana would improve cognitive ability and impulse control, so it may be useful for ADHD.
Other research shows that marijuana use had no effect on cognitive abilities, or possibly made them worse, particularly if an individual started using it at a younger age. Some evidence suggests that potential side effects may make it hazardous.
Supporters point out that marijuana has similar effects to conventional medication in restoring balance to dopamine levels in the brain.
On this basis, they suggest that because people with ADHD do not experience any adverse effects, marijuana is better for treating ADHD than traditional medications with known side effects.