The 94-day cannabis study.

The UCLA cannabis project has provided several interesting observations that contribute to our knowledge about this plant and its constituents. Some of the findings (reduction in intraocular pressure, bronchodilation) may have therapeutic significance in the future. Certain results (testosterone lowering, airway narrowing after heavy use) indicate that side effects are also a possibility. Other data (unchanged immune response, lack of chromosomal alterations) seem to controvert the reports of other investigators. Still other information obtained (hemispheric lateralization, electroencephalographic changes) appears to represent new knowledge about the effects of cannabis on humans.