Seek medical attention right away if you have symptoms of serotonin syndrome, such as: agitation, hallucinations, fever, sweating, shivering, fast heart rate, muscle stiffness, twitching, loss of coordination, nausea, vomiting, or diarrhea.

Vyvanse can affect growth in children. Tell your doctor if your child is not growing at a normal rate while using this medicine.

Common Vyvanse side effects may include:

• dry mouth, loss of appetite, weight loss;
• sleep problems (insomnia);
• fast heart rate, feeling jittery;
• dizziness, feeling anxious or irritable; or
• nausea, vomiting, stomach pain, diarrhea, constipation.

Drug Interactions for Vyvanse buy vyvanse online

Drug interactions may change how your medications work or increase your risk for serious side effects. This document does not contain all possible drug interactions. Keep a list of all the products you use (including prescription/nonprescription drugs and herbal products) and share it with your doctor and pharmacist. Do not start, stop, or change the dosage of any medicines without your doctor’s approval.

Taking MAO inhibitors with this medication may cause a serious (possibly fatal) drug interaction. Avoid taking MAO inhibitors (isocarboxazid, linezolid, methylene blue, moclobemide, phenelzine, procarbazine, rasagiline, safinamide, selegiline, tranylcypromine) during treatment with this medication. Most MAO inhibitors should also not be taken for two weeks before treatment with this medication. Ask your doctor when to start or stop taking this medication.

Some products have ingredients that could raise your heart rate or blood pressure. Tell your pharmacist what products you are using, and ask how to use them safely (especially cough-and-cold products or diet aids).

The risk of serotonin syndrome/toxicity increases if you are also taking other drugs that increase serotonin. Examples include street drugs such as MDMA/ “ecstasy,” St. John’s wort, certain antidepressants (including SSRIs such as fluoxetine/paroxetine, SNRIs such as duloxetine/venlafaxine), among others. The risk of serotonin syndrome/toxicity may be more likely when you start or increase the dose of these drugs.

Lisdexamfetamine is very similar to amphetamine or dextroamphetamine. Do not use medications containing amphetamine or dextroamphetamine while using lisdexamfetamine.

Enhancing performance

This passage is taken directly from amphetamine.

Cognitive performance

In 2015, a systematic review and meta-analysis of high-quality clinical trials revealed that, when used at low (therapeutic) doses, amphetamine produces modest yet unmistakable enhancements in cognition in healthy normal adults, including working memory, long-term episodic memory, inhibitory control, and some aspects of attention. These effects of amphetamine on cognition are known to be partially mediated through the indirect activation of both dopamine receptor D1 and D2.

Low dosages of amphetamine also enhance memory consolidation, which enhances knowledge recall, according to a comprehensive review from 2014 showed that low dosages of amphetamine enhance memory consolidation, which enhances knowledge recall. In addition to improving working memory in all people, therapeutic doses of amphetamine also improve cortical network efficiency.

Amphetamine and other ADHD stimulants also raise arousal (wakefulness) and task saliency (desire to do a task), which in turn encourage goal-directed behavior. Some students use stimulants, such as amphetamine, as study and test-taking aids because they can increase performance on challenging and monotonous tasks.

5-35 percent of college students use diverted ADHD stimulants, which are generally utilized for improving academic performance rather than as recreational drugs, according to research of self-reported illicit stimulant usage. However, large amphetamine dosages that are outside of the therapeutic range can affect other components of cognitive control, including working memory. buy vyvanse online 

Physical performance

Some athletes use amphetamine for its psychological and performance-improving qualities, such as improved stamina and alertness; however, non-medical amphetamine use is forbidden at sporting events that are governed by collegiate, national, and international anti-doping organizations.

Amphetamine has been proven to improve athletic performance in anaerobic situations, muscle strength, and acceleration in healthy individuals when taken orally at therapeutic levels, and endurance (i.e., it delays the onset of fatigue), while improving reaction time.

Amphetamine improves endurance and reaction time primarily through reuptake inhibition and release of dopamine in the central nervous system. buy vyvanse online

Amphetamine and other dopaminergic drugs also increase power output at fixed levels of perceived exertion by overriding a “safety switch”, allowing the core temperature limit to increase in order to access a reserve capacity that is normally off-limits. At therapeutic doses, the adverse effects of amphetamine do not impede athletic performance; however, at much higher doses, amphetamine can induce effects that severely impair performance, such as rapid muscle breakdown and elevated body temperature.

Contraindications 

Pharmaceutical lisdexamfetamine dimesylate is contraindicated in patients with hypersensitivity to amphetamine products or any of the formulation’s inactive ingredients. It is also contraindicated in patients who have used a monoamine oxidase inhibitor (MAOI) within the last 14 days.

Amphetamine products are contraindicated by the United States Food and Drug Administration (USFDA) in people with a history of drug abuse, heart disease, or severe agitation or anxiety, or in those currently experiencing arteriosclerosis, glaucoma, hyperthyroidism, or severe hypertension.^[58] The USFDA advises anyone with bipolar disorder, depression, elevated blood pressure, liver or kidney problems, mania, psychosis, Raynaud’s phenomenon, seizures, thyroid problems, tics, or Tourette syndrome to monitor their symptoms while taking amphetamine.

 Amphetamine is classified in US pregnancy category C. This means that detriments to the fetus have been observed in animal studies and adequate human studies have not been conducted; amphetamine may still be prescribed to pregnant women if the potential benefits outweigh the risks. buy vyvanse online

 Amphetamine has also been shown to pass into breast milk, so the USFDA advises mothers to avoid breastfeeding when using it. Due to the potential for stunted growth, the USFDA advises monitoring the height and weight of children and adolescents prescribed amphetamines. Prescribing information approved by the Australian Therapeutic Goods Administration further contraindicates anorexia.