What are the effects of mixing marijuana with alcohol, tobacco or prescription drugs?

Using alcohol and marijuana at the same time is likely to result in greater impairment than when using either one alone. Using marijuana and tobacco at the same time may also lead to increased exposure to harmful chemicals, causing greater risks to the lungs, and the cardiovascular system. Also, be aware that marijuana may change how prescription drugs work. Always talk with your doctor about any medications you are taking or thinking about taking and possible side effects when mixed with other things like marijuana.