Dextroamphetamine

Attention Deficit Hyperactivity Disorder (ADHD)

Dextroamphetamine is primarily used to manage the symptoms of ADHD in both children and adults. It is typically prescribed as part of a total treatment program that may include psychological, educational, and social therapy. When used for ADHD, this medication helps to:

• Increase the ability to pay attention and stay focused on an activity.
• Decrease impulsiveness and hyperactivity.
• Improve listening skills and organizational abilities.

Narcolepsy

This medication is also indicated for the treatment of narcolepsy. Narcolepsy is a sleep disorder that causes excessive daytime sleepiness and sudden, uncontrollable attacks of sleep. Dextroamphetamine helps individuals stay awake during the day and reduces the frequency of these sleep episodes.

How It Works

Dextroamphetamine belongs to a class of medications called central nervous system stimulants. It works by changing the amounts of certain natural substances in the brain that affect impulse control and hyperactivity. While it helps manage symptoms, it is not a cure for ADHD or narcolepsy.

Stimulant Activity

Dextroamphetamine belongs to a class of medications known as central nervous system stimulants. It works by changing the amounts of certain natural substances in the brain that affect impulse control and hyperactivity.

While the exact process by which this medication works for conditions like ADHD is not fully understood, it is believed to involve the following actions:

• Increasing chemical messengers: The medication is thought to increase the levels and activity of neurotransmitters, specifically dopamine and norepinephrine, in the brain.
• Improving communication: By boosting these chemicals, the drug helps improve the way different parts of the brain communicate, which can enhance attention and focus.

In people with narcolepsy, these stimulant effects help promote wakefulness and reduce excessive daytime sleepiness by stimulating the parts of the brain that control alertness.

Common Side Effects

Many people using dextroamphetamine experience mild side effects. These often include:

• Dry mouth
• Headache
• Stomach pain, nausea, vomiting, diarrhea, or constipation
• Loss of appetite and weight loss
• Nervousness, restlessness, or dizziness
• Difficulty falling asleep or staying asleep
• Changes in sex drive or sexual performance
• Excessive sweating or tremors

Serious Side Effects

Contact a healthcare provider immediately if you experience any of the following serious symptoms:

• Fast, pounding, or irregular heartbeat
• Chest pain, shortness of breath, or fainting
• Slow or difficult speech, or weakness and numbness in an arm or leg
• Seizures or uncontrollable motor or verbal tics
• Changes in vision
• New or worsening psychiatric symptoms, such as aggression, hallucinations, paranoia, or mania
• Signs of an allergic reaction, including rash, hives, itching, or swelling of the face, tongue, or throat
• Circulation problems, such as numbness, pain, or skin color changes in the fingers or toes

In rare cases, a serious condition called serotonin syndrome may occur, especially when taken with other medications. Symptoms include agitation, hallucinations, rapid heart rate, muscle stiffness, or severe nausea and vomiting.

Boxed Warning: Abuse and Dependence

Dextroamphetamine has a high potential for abuse and misuse, which can lead to physical and psychological dependence. Misuse of this medication may result in serious cardiovascular events or sudden death. Healthcare providers typically assess the risk of abuse before prescribing and monitor for signs of misuse during treatment.

Cardiovascular Risks

Serious heart-related problems have been reported with the use of stimulant medications, including:

• Sudden Death: This has occurred in children and adolescents with structural heart defects or other serious heart problems, as well as in adults.
• Stroke and Heart Attack: Adults are at an increased risk for stroke and heart attack.
• Blood Pressure and Heart Rate: This medication can cause increases in blood pressure and heart rate. It is generally avoided in patients with known structural heart abnormalities, cardiomyopathy, or serious heart rhythm disorders.

Psychiatric Warnings

Dextroamphetamine may cause or worsen psychiatric symptoms, even in patients without a prior history of mental illness:

• Psychotic or Manic Symptoms: New symptoms such as hallucinations, delusional thinking, or mania may occur in children and adolescents.
• Pre-existing Conditions: The medication may exacerbate symptoms in patients with pre-existing psychotic disorders or bipolar disorder.
• Aggression: Emergent aggressive behavior or hostility has been observed in some patients starting stimulant therapy.

Growth Suppression

Long-term use of stimulants in children may be associated with a temporary slowing of growth. Healthcare providers usually monitor height and weight during treatment, and therapy may be interrupted if a child is not growing or gaining weight as expected.

Contraindications and Other Precautions

Dextroamphetamine is typically not used in individuals with certain medical conditions, including:

• Advanced arteriosclerosis or symptomatic cardiovascular disease.
• Moderate to severe high blood pressure.
• Hyperthyroidism or glaucoma.
• A history of drug abuse or highly agitated states.
• A known allergy or hypersensitivity to stimulant medications.

This medication must not be used during or within 14 days of taking a monoamine oxidase inhibitor (MAOI), as this can lead to a hypertensive crisis. There is also a risk of serotonin syndrome, a potentially life-threatening condition, when used in combination with other drugs that affect serotonin levels. Dextroamphetamine may also lower the seizure threshold in patients with a history of seizures.

Pregnancy

It is not fully known if dextroamphetamine will harm an unborn baby. However, taking this medication during pregnancy may increase the risk of premature birth or low birth weight. Infants born to individuals who are dependent on amphetamines may also experience withdrawal symptoms after birth, such as excessive drowsiness or agitation.

If you are pregnant or planning to become pregnant, discuss the potential risks and benefits of continuing this medication with your healthcare provider.

Breastfeeding

Dextroamphetamine passes into breast milk and can cause side effects in a nursing child. Because of the risk of serious adverse reactions, healthcare providers generally recommend that individuals do not breastfeed while taking this medication. Consult with a doctor to determine the best way to feed your baby while managing your condition.

Oral Formulations

Dextroamphetamine is primarily available in the following oral formats:

• Immediate-release tablets: These tablets release the medication into the system shortly after ingestion.
• Extended-release capsules: These capsules are designed to release the medication gradually over a longer period.
• Oral solution: A liquid form of the medication is available for individuals who prefer it or have difficulty swallowing solid dosage forms.

The choice of formulation depends on the specific condition being treated and the patient's needs for medication release timing.

FDA Approval and Indications

Dextroamphetamine is approved by the U.S. Food and Drug Administration (FDA) for the treatment of the following conditions:

• Attention Deficit Hyperactivity Disorder (ADHD)
• Narcolepsy

Boxed Warning

The FDA has issued a boxed warning for dextroamphetamine regarding its high potential for abuse and misuse. Healthcare providers are required to assess the risk of abuse before prescribing and must monitor patients for signs of misuse and addiction during treatment. Misuse of amphetamines can result in serious cardiovascular events and sudden death.

Regulatory Classification

Dextroamphetamine is a Schedule II controlled substance under the Controlled Substances Act. This classification indicates that the drug has a high potential for abuse, which may lead to severe psychological or physical dependence. Consequently, there are strict regulations governing its prescription, including limitations on refills and specific storage requirements.

Safety Communications and Requirements

The FDA requires that a Medication Guide be dispensed with every dextroamphetamine prescription to inform patients of potential safety concerns. Key regulatory warnings include:

• Cardiovascular Risks: Potential for sudden death in patients with structural heart abnormalities or other serious heart problems. It may also increase blood pressure and heart rate.
• Psychiatric Risks: Potential for new or worsening psychotic or manic symptoms, even in patients without a prior history of these conditions.
• Growth Monitoring: Warnings regarding the potential for temporary slowing of growth in children, requiring regular monitoring of height and weight during treatment.

Risk of Misuse and Dependence

Dextroamphetamine is a central nervous system stimulant with a high potential for misuse and addiction. It is classified as a controlled substance because taking it in ways other than prescribed can lead to physical and psychological dependence. Misuse involves taking higher doses than recommended, taking the medication more often than scheduled, or using it without a prescription.

Serious Health Risks

Abusing stimulants like dextroamphetamine increases the risk of severe medical complications. These may include:

• Increased heart rate and dangerously high blood pressure.
• Serious cardiovascular events, such as heart attack or stroke.
• Sudden death, particularly in individuals with underlying heart defects or heart disease.
• Mental health changes, including agitation, hostility, hallucinations, or mania.

Withdrawal and Tolerance

Over time, the body may develop a tolerance to the drug, meaning higher doses are needed to achieve the same effect. If a person who has used dextroamphetamine regularly for a long period suddenly stops taking it, they may experience withdrawal symptoms. These symptoms can include:

• Extreme tiredness or fatigue.
• Sleep disturbances, such as insomnia or excessive sleepiness.
• Severe depression or significant mood changes.

To minimize the risk of addiction, it is essential to take the medication exactly as prescribed and to discuss any history of substance use disorders with a healthcare provider before starting treatment.