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  2. Opioid - Wikipedia

    en.wikipedia.org/wiki/Opioid

    Long-term opioid use can cause opioid-induced hyperalgesia, which is a condition in which the patient has increased sensitivity to pain. [101] All of the opioids can cause side effects. [70] Common adverse reactions in patients taking opioids for pain relief include nausea and vomiting, drowsiness, itching, dry mouth, dizziness, and constipation.

  3. Drug overdose - Wikipedia

    en.wikipedia.org/wiki/Drug_overdose

    Symptoms of opioid overdoses include slow breathing, heart rate and pulse. [6] Opioid overdoses can also cause pinpoint pupils, and blue lips and nails due to low levels of oxygen in the blood. A person experiencing an opioid overdose might also have muscle spasms, seizures and decreased consciousness. A person experiencing an opiate overdose ...

  4. Opioid overdose - Wikipedia

    en.wikipedia.org/wiki/Opioid_overdose

    An opioid overdose is toxicity due to excessive consumption of opioids, such as morphine, codeine, heroin, fentanyl, tramadol, and methadone. [3] [5] This preventable pathology can be fatal if it leads to respiratory depression, a lethal condition that can cause hypoxia from slow and shallow breathing. [3]

  5. Opioid-induced hyperalgesia - Wikipedia

    en.wikipedia.org/wiki/Opioid-induced_hyperalgesia

    In opioid-induced hyperalgesia, sensitization of pronociceptive mechanisms occurs, resulting in a decrease in the pain threshold, or allodynia. [10] In addition, what appears to be opioid tolerance can be caused by opioid-induced hyperalgesia lowering the baseline pain level, thus masking the drug's analgesic effects. [11]

  6. Substance abuse - Wikipedia

    en.wikipedia.org/wiki/Substance_abuse

    Drugs most often associated with this term include alcohol, amphetamines, barbiturates, benzodiazepines, cannabis, cocaine, hallucinogens, methaqualone, and opioids. The exact cause of substance abuse is not clear, but there are two predominant theories: either a genetic predisposition or a habit learned from others, which, if addiction ...

  7. Opioid use disorder - Wikipedia

    en.wikipedia.org/wiki/Opioid_use_disorder

    Chronic intake of opioids such as heroin may cause long-term effects in the orbitofrontal area (OFC), which is essential for regulating reward-related behaviors, emotional responses, and anxiety. [74] Moreover, neuroimaging and neuropsychological studies demonstrate dysregulation of circuits associated with emotion, stress and high impulsivity ...

  8. Narcotic - Wikipedia

    en.wikipedia.org/wiki/Narcotic

    Endogenous opioids (enkephalins, dynorphin, endorphin) do not bind specifically to any particular opioid receptor. Receptor binding of the opioid causes a cascade leading to the channel opening and hyperpolarization of the neuron. The opioid receptors have the following channel types: mu, K + channel; l delta, K + channel; kappa, Ca 2+ channel ...

  9. Substance use disorder - Wikipedia

    en.wikipedia.org/wiki/Substance_use_disorder

    "Substance use pertains to using select substances such as alcohol, tobacco, illicit drugs, etc. that can cause dependence or harmful side effects."On the other hand, substance abuse is the use of drugs such as prescriptions, over-the-counter medications, or alcohol for purposes other than what they are intended for or using them in excessive ...