People who smoke marijuana get a high followed by a sense of drowsiness which is extremely addictive. Marijuana is a very commonly abused drug thanks to widespread myths that it is "harmless" despite its many severe side effects and consequences from long term use. It also often acts as a "gateway drug" with many people of all ages starting a drug addiction with marijuana before moving onto "harder" drugs like heroin or cocaine. Side effects include psychological problems like anxiety, depression and paranoia, and can aggravate existing mental health issues such as schizophrenia. Long term use affects blood pressure which leads to heart problems. Similarly to tobacco, smokable marijuana has many unpleasant chemical additives in it which cause problems like lung disease and cancer.