Methadone is a narcotic analgesic used to treat moderate to severe pain that is not relieved by other pain medicines. Methadone HCl is also used in treating narcotic addiction as part of a treatment program.

Effects on the body

Therapeutic doses of the drug have a sedative and analgesic effect. The drug affects the nervous and cardiovascular system and smooth muscle. Overdose causes suppression of blood circulation, respiratory depression, failure of renal function, pulmonary edema. With chronic use high blood pressure, frequent palpitations, spasms of bile ducts, relaxation and lethargy, hyperglycemia (increased blood glucose level)

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Product Description

Traditionally methadone has been associated with the treatment of heroin addiction. However, methadone is an analgesic alternative for treating refractory pain. Pharmacokinetic properties of methadone require initiation at a low dosage with gradual titration to effect to reduce the potential for side effects and adverse outcomes. Risk of toxicity due to overdose increases significantly if the dosage increased too rapidly.

Methadone is a substance that is a synthetic opioid that exerts a pronounced analgesic effect. Distinguished in its chemical structure from morphine, but it has a similar effect. In the postwar period, Soviet scientists, after studying the impact of the drug (it belongs to the group of narcotic analgesics), began to use it instead of morphine. Methadone is also much more useful for oral administration than morphine. Since the mid-60-is of the XX century, the drug was used to treat drug addicts. The best way to reduce the effects of Methadone. The dosage is selected in such a way that it continuously decreases, but without the accompanying deterioration of the patient’s well-being. This treatment accompanied by the conduct of psychotherapeutic sessions and the parallel assignment of maintenance drugs. As the drug although is used for the treatment of addicted persons, but in itself is a drug. Its use causes many controversies among drug doctors both in the medical plan and in the organizational one the distribution and control of the drug intake must be very careful. Otherwise, Methadone will get be in the hands of drug addicts and will be used uncontrolled

Pharmacy
The drug is an opioid agonist. Agonists are substances that, in response to receptors, cause a reaction in response. Antagonists are substances that, on the contrary, reduce or block the response of the receptor to natural body signals. A morphine antagonist, for example, is naloxone. Morphine activates the receptors and its molecules join the opioid receptors. And naloxone competitively replaces the receptor, leaving no possibility for the particles of morphine to join the receptor. The effect of the drug is long, unlike many medications up to 36 hours, with a pronounced euphoric reaction, he does not. Due to this, abstinence syndrome after the end of the drug can be minimized. Anesthetic effect of the drug appears in half an hour an hour after taking and lasts about 5 hours. The drug is rapidly absorbed from the digestive tract when ingested; its bioavailability is 80. The drug has a sufficiently long half-life (more than 24 hours), so when taking methadone substitution therapy, you can take the pill once a day, rather than more often. Biotransformation of the drug occurs in the liver, and excretion performed with feces and urine.

Form of release
The drug is available as a solution for injection and in the form of tablets. Indications. The drug used as an anesthetic. The drug is used for substitution maintenance therapy in persons with opioid dependence.

Application
For opioid addicts (as a rule, they use heroin) the drug is prescribed orally. To reduce the intensity of manifestation of the withdrawal syndrome, a daily dose of 15 to 40 mg is prescribed. With maintenance replacement therapy, 20 to 120 mg prescribed. Subsequently, the dosage smoothly and slowly reduced, and ideally, the dosage reaches zero values and canceled. As an anesthetic for a severe pain syndrome, the drug administered as an intramuscular or subcutaneous injection. Injections were done several times a day. The maximum total daily dosage is 120 mg.

Side effects.

Most often there are such undesirable effects as constipation, excessive sweating, insomnia, impaired concentration, sexual weakness. It is not excluded also the appearance of nausea, drowsiness, euphoria, narrowing of the pupils. Interaction. The level of the substance in the blood is affected by the use of antiretroviral drugs, some antibiotics, anti-tuberculosis drugs, antiepileptic drugs.

Effects on the body

Therapeutic doses of the drug have a sedative and analgesic effect. The drug affects the nervous and cardiovascular system and smooth muscle. Overdose causes suppression of blood circulation, respiratory depression, failure of renal function, pulmonary edema. With chronic use high blood pressure, frequent palpitations, spasms of bile ducts, relaxation and lethargy, hyperglycemia (increased blood glucose level).

Toxicity.
The minimum dose of the drug, leading to the death of an accidental user, is 50 mg. For addicts who have already developed tolerance, this dose reaches 200 mg. At casual consumers at the concentration of Methadone 1 mg / ml in plasma, the lethal damage of a liver comes. Concentration of more than 2 mg / ml can lead to death.

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