Article Excerpt: Marijuana use makes tobacco use more pleasurable and may increase the user’s risk for becoming addicted to nicotine. These are the implications of recent experiments in which exposing rats to delta-9-tetrahydrocannabinol (THC) caused the animals to self-administer nicotine more readily and work harder for it.
Full Article: http://tinyurl.com/qf6toty
Article Source: National Institute on Drug Abuse (NIDA)