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Attention, chocolate lovers: You may not be able to help yourselves. Swiss and British scientists have linked the widespread love of chocolate to a chemical "signature" that may be programmed into our metabolic systems.
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Substance Abuse - Drug Abuse and Addiction

Symptoms & Signs

What are the signs and symptoms of the condition?

Several of the following symptoms or signs occur when a person is addicted to a drug. The person may:

be unable to cut down on drug use when he or she wants to

continue to use the drug despite the problems it causes

develop tolerance for the drug, so that increased amounts are needed to get the same effect

find that the drug causes problems in life, such as getting in trouble with the law

have cravings or grow irritable when the drug cannot be used

skip some important activities because of the drug

spend a large amount of time getting, using, or getting over the drug

use the drug more often or more heavily than intended

Physical symptoms vary depending on the drug being abused and the extent of the drug use. The health risks of tobacco, for example, are different than the health risks of drugs such as alcohol or cocaine.

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