Read the article below and answer the questions:

http://www.cnn.com/2010/HEALTH/02/22/medical.marijuana/#

What main symptom is marijuana being used to treat in the article; which system (in the nervous system/brain) does it work on? (1)

What are the 2 problems with using herbal marijuana as a treatment? (2)

List the drug derived from cannabis and describe what they are used to treated? (3)

What class of compound are they? (1)

List the 3 common side affects? (3)