Physical dependence

Physical dependence is a physiological state of adaptation to a substance, the absence of which produces symptoms and signs of withdrawal. It is a common phenomenon with many medications and drugs, including alcohol, opioids, and certain types of sedatives.

Definition

Physical dependence is defined by the presence of tolerance and withdrawal. Tolerance is a state of adaptation in which exposure to a drug induces changes that result in a decrease of the drug's effects over time. Withdrawal refers to symptoms that occur when a drug that causes physical dependence is abruptly discontinued or decreased.

Causes

Physical dependence can develop from using many types of substances, including prescription medications, alcohol, and illicit drugs. The exact cause of physical dependence varies depending on the substance, but it generally involves changes in neurotransmitter levels and function in the brain.

Symptoms

Symptoms of physical dependence can vary widely depending on the substance, but they often include anxiety, restlessness, insomnia, and physical discomfort. In severe cases, withdrawal symptoms can be life-threatening.

Treatment

Treatment for physical dependence typically involves gradually reducing the dose of the substance, or switching to a different drug that is easier to withdraw from. This process, known as detoxification, is often accompanied by counseling and other forms of therapy to help manage symptoms and prevent relapse.

See also

• Addiction
• Substance dependence
• Drug withdrawal
• Substance abuse

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