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Naloxone, sold under the brand name Narcan among others, is an opioid antagonist, a medication used to reverse or reduce the effects of opioids. [13] For example, it is used to restore breathing after an opioid overdose . [ 13 ]
Caesium in the body has a biological half-life of about one to four months. Mercury (as methylmercury) in the body has a half-life of about 65 days. Lead in the blood has a half life of 28–36 days. [29] [30] Lead in bone has a biological half-life of about ten years. Cadmium in bone has a biological half-life of about 30 years.
Since (+)-naloxone and (+)-naltrexone lack affinity for opioid receptors, they do not block the effects of opioid analgesic drugs, and so can be used to counteract the TLR4-mediated side effects of opioid agonists without affecting analgesia, [6] though (+)-naloxone does reduce the reinforcing effects of opioid drugs.
It has a slow onset of activity, with a long duration of action, and a long half-life of 24 to 60 hours. Once a patient has stabilised on the (buprenorphine) medication and programme, three options remain - continual use (buprenorphine-only medication), switching to a buprenorphine/naloxone combination, or a medically supervised withdrawal. [32]
Elimination half-life: The time required for the concentration of the drug to reach half of its original value. 12 h Elimination rate constant: The rate at which a drug is removed from the body.
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In 2002, the U.S. Food and Drug Administration approved both buprenorphine (Subutex) and buprenorphine-naloxone (Suboxone) for the treatment of opiate dependence. Suboxone combines bupe with naloxone, the drug that paramedics use to revive overdose victims.
Buprenorphine/naloxone, sold under the brand name Suboxone among others, is a fixed-dose combination medication that includes buprenorphine and naloxone. [3] It is used to treat opioid use disorder, and reduces the mortality of opioid use disorder by 50% (by reducing the risk of overdose on full-agonist opioids such as heroin or fentanyl).