Dopamine is a neurotransmitter that is involved in reward, motivation, and pleasure. It is released in the brain when we experience something pleasurable, such as eating a delicious meal or taking a drug of abuse.

Addiction is a chronic, relapsing brain disease that is characterized by compulsive use of a substance despite negative consequences. It is caused by changes in the brain that are caused by repeated exposure to the substance.

Methadone, buprenorphine, and naltrexone are all pharmacological treatments for opioid use disorder. Methadone and buprenorphine are opioid agonists that can reduce cravings and withdrawal symptoms. Naltrexone is an opioid antagonist that blocks the effects of opioids.

Withdrawal is the physical and psychological symptoms that occur when a person stops using a substance after prolonged use. Symptoms can include anxiety, insomnia, sweating, nausea, and vomiting.

Disulfiram, acamprosate, and naltrexone are all pharmacological treatments for alcohol use disorder. Disulfiram causes unpleasant side effects when alcohol is consumed. Acamprosate reduces cravings and withdrawal symptoms. Naltrexone blocks the effects of alcohol.

Tolerance is the increased need for a substance to achieve the same effect. It is caused by changes in the brain that are caused by repeated exposure to the substance.

Methylphenidate is a common pharmacological treatment for stimulant use disorder. It is a stimulant that can reduce cravings and withdrawal symptoms.

Dependence is the use of a substance to relieve or avoid withdrawal symptoms. It is a sign of addiction.

Cannabidiol (CBD), nabilone, and dronabinol are all pharmacological treatments for cannabis use disorder. CBD is a non-psychoactive cannabinoid that can reduce cravings and withdrawal symptoms. Nabilone and dronabinol are synthetic cannabinoids that can also reduce cravings and withdrawal symptoms.

Substance abuse is the use of a substance in a way that is harmful to oneself or others. It can include using a substance in a way that is illegal, dangerous, or that interferes with one's ability to function in everyday life.

Varenicline, bupropion, and nicotine replacement therapy are all pharmacological treatments for nicotine use disorder. Varenicline and bupropion are non-nicotine medications that can reduce cravings and withdrawal symptoms. Nicotine replacement therapy provides the body with nicotine in a controlled way, which can help to reduce cravings and withdrawal symptoms.

Substance abuse is the use of a substance for non-medical purposes. It can include using a substance in a way that is illegal, dangerous, or that interferes with one's ability to function in everyday life.

Olanzapine, risperidone, and quetiapine are all pharmacological treatments for hallucinogen use disorder. These medications can help to reduce hallucinations and other psychotic symptoms.

Substance use is the use of a substance in a way that is consistent with medical advice. It can include using a substance to treat a medical condition or to improve one's health.

There is no specific pharmacological treatment for inhalant use disorder. Treatment typically involves supportive care and counseling.