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21-Jul-2017 11:25

These sex addictions (i.e., drug-induced compulsive sexual behaviors) are associated with a dopamine dysregulation syndrome which occurs in some patients taking dopaminergic drugs, such as amphetamine or methamphetamine.

According to the current Cochrane review on drug dependence and withdrawal in recreational users of methamphetamine, "when chronic heavy users abruptly discontinue [methamphetamine] use, many report a time-limited withdrawal syndrome that occurs within 24 hours of their last dose".

Muscle cramps such as "charley horse", sometimes severe and prolonged, can occur both in short-term use and more dangerously in long-term use due to electrolyte imbalance from poor diet and dehydration.

According to the American Dental Association, meth mouth "is probably caused by a combination of drug-induced psychological and physiological changes resulting in xerostomia (dry mouth), extended periods of poor oral hygiene, frequent consumption of high-calorie, carbonated beverages and bruxism (teeth grinding and clenching)".

In particular, methamphetamine appears to cause hyperintensity and hypertrophy of white matter, marked shrinkage of hippocampi, and reduced gray matter in the cingulate cortex, limbic cortex, and paralimbic cortex in recreational methamphetamine users.

Moreover, evidence suggests that adverse changes in the level of biomarkers of metabolic integrity and synthesis occur in recreational users, such as a reduction in N-acetylaspartate and creatine levels and elevated levels of choline and myoinositol.

Methamphetamine belongs to the substituted phenethylamine and substituted amphetamine chemical classes.

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They suggest the side effect has been exaggerated and stylized to create a stereotype of current users to deter new ones.

The psychological effects of methamphetamine can include euphoria, dysphoria, changes in libido, alertness, apprehension and concentration, decreased sense of fatigue, insomnia or wakefulness, self-confidence, sociability, irritability, restlessness, grandiosity and repetitive and obsessive behaviors.

The NF-κB-mediated neuroimmune response to methamphetamine use which results in the increased permeability of the blood–brain barrier arises through its binding at and activation of sigma receptors, the increased production of reactive oxygen species (ROS), reactive nitrogen species (RNS), and damage-associated molecular pattern molecules (DAMPs), the dysregulation of glutamate transporters (specifically, EAAT1 and EAAT2) and glucose metabolism, and excessive Ca Moreover, methamphetamine neurotoxicity is associated with an increased risk of Parkinson's disease, an effect which partially arises through excessive cytosolic and synaptic production of reactive oxygen species and autoxidation of dopamine.

Internationally, the production, distribution, sale, and possession of methamphetamine is restricted or banned in many countries, due to its placement in schedule II of the United Nations Convention on Psychotropic Substances treaty.

While dextromethamphetamine is a more potent drug, racemic methamphetamine is sometimes illicitly produced due to the relative ease of synthesis and limited availability of chemical precursors.

In low doses, methamphetamine can elevate mood, increase alertness, concentration and energy in fatigued individuals, reduce appetite, and promote weight loss.



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