TB, or tuberculosis, is a disease caused by bacteria called Mycobacterium tuberculosis. The bacteria can attack any part of your body, but they usually attack the lungs. TB is spread through the air from one person to another.
The duration of withdrawal from marijuana is different for everyone. For most heavy marijuana users, withdrawal symptoms begin on the first day after quitting and peak within 48 to 72 hours. Symptoms generally last two to three weeks and dissipate over time.
Physical Effects. 1  Breathing problems. Marijuana smoke irritates the lungs, and people who smoke marijuana frequently can have the same breathing problems as those who smoke tobacco. 2  Increased heart rate. Marijuana raises heart rate for up to 3 hours after smoking. 3  Problems with child development during and after pregnancy.