ABOUT
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Dextroamphetamine (D-AMP)is a central nervous system (CNS) stimulant and an amphetamine enantiomer[note 2] that is prescribed for the treatment of attention deficit hyperactivity disorder (ADHD) and narcolepsy.[17][18] It is also used as an athletic performance and cognitive enhancer, and recreationally as an aphrodisiac and euphoriant. Dextroamphetamine was also used in the past by some countries’ military forces to fight fatigue during extended combat operations.
The amphetamine molecule exists as two enantiomers,[note 2] levoamphetamine and dextroamphetamine. Dextroamphetamine is the dextrorotatory, or ‘right-handed’, enantiomer and exhibits more pronounced effects on the central nervous system than levoamphetamine. Pharmaceutical dextroamphetamine sulfate is available as both a brand name and generic drug in a variety of dosage forms. Dextroamphetamine is sometimes prescribed as the inactive prodrug lisdexamfetamine dimesylate, which is converted into dextroamphetamine after absorption.
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Dextroamphetamine, like other amphetamines, elicits its stimulating effects via several distinct actions: it inhibits or reverses the transporter proteins for the monoamine neurotransmitters (namely the serotonin, norepinephrine and dopamine transporters) either via trace amine-associated receptor 1 (TAAR1) or in a TAAR1 independent fashion when there are high cytosolic concentrations of the monoamine neurotransmitters[20] and it releases these neurotransmitters from synaptic vesicles via vesicular monoamine transporter 2.[21] It also shares many chemical and pharmacological properties with human trace amines, particularly phenethylamine and N-methylphenethylamine, the latter being an isomer of amphetamine produced within the human body.
How to use Dexedrine
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Dextroamphetamine is used to treat attention deficit hyperactivity disorder (ADHD) and narcolepsy (a sleep disorder), and is sometimes prescribed off-label for its past medical indications, such as depression and obesity.[17][18] Long-term amphetamine exposure at sufficiently high doses in some animal species is known to produce abnormal dopamine system development or nerve damage,[22][23] but, in humans with ADHD, pharmaceutical amphetamines, at therapeutic dosages, appear to improve brain development and nerve growth.[24][25][26] Reviews of magnetic resonance imaging (MRI) studies suggest that long-term treatment with amphetamine decreases abnormalities in brain structure and function found in subjects with ADHD, and improves function in several parts of the brain, such as the right caudate nucleus of the basal ganglia.[24][25][26]
Reviews of clinical stimulant research have established the safety and effectiveness of long-term continuous amphetamine use for the treatment of ADHD.[27][28][29] Randomized controlled trials of continuous stimulant therapy for the treatment of ADHD spanning 2 years have demonstrated treatment effectiveness and safety.[27][28] Two reviews have indicated that long-term continuous stimulant therapy for ADHD is effective for reducing the core symptoms of ADHD (i.e., hyperactivity, inattention, and impulsivity), enhancing quality of life and academic achievement, and producing improvements in a large number of functional outcomes[note 3] across 9 categories of outcomes related to academics, antisocial behavior, driving, non-medicinal drug use, obesity, occupation, self-esteem, service use (i.e., academic, occupational, health, financial, and legal services), and social function.[27][29] One review highlighted a nine-month randomized controlled trial of amphetamine treatment for ADHD in children that found an average increase of 4.5 IQ points, continued increases in attention, and continued decreases in disruptive behaviors and hyperactivity.[28] Another review indicated that, based upon the longest follow-up studies conducted to date, lifetime stimulant therapy that begins during childhood is continuously effective for controlling ADHD symptoms and reduces the risk of developing a substance use disorder as an adult
Side Effects
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Cardiovascular side effects can include hypertension or hypotension from a vasovagal response, Raynaud’s phenomenon (reduced blood flow to the hands and feet), and tachycardia (increased heart rate).[59][51][68] Sexual side effects in males may include erectile dysfunction, frequent erections, or prolonged erections.[59] Gastrointestinal side effects may include abdominal pain, constipation, diarrhea, and nausea.[1][59][69] Other potential physical side effects include appetite loss, blurred vision, dry mouth, excessive grinding of the teeth, nosebleed, profuse sweating, rhinitis medicamentosa (drug-induced nasal congestion), reduced seizure threshold, tics (a type of movement disorder), and weight loss.[sources 1] Dangerous physical side effects are rare at typical pharmaceutical doses