Tolerance

From Drug Rehab Wiki

Tolerance occurs when the body adapts to a pharmacological substance so that increasingly larger doses are required to produce the same effect experienced in the past using a much smaller dose. For example, someone might drink two drinks each night to feel good, but as time passes they need three, then four, and maybe even more drinks to get the same "good feeling" they experienced.

Drug tolerance differs from drug resistance. Drug resistance is most often associated with antibiotics and refers to the bacteria that the drug is attempting to destroy. In drug resistance the invading bacteria becomes resistant to the antibiotic, not the human body itself.

Tolerance is most often associated with mood-altering drugs and alcohol and is often coupled with cravings.