Focalin 5 mg (Dexmethylphenidate): Uses, Dosing, Side Effects, and Precautions

Focalin (dexmethylphenidate HCl) is the d-enantiomer of methylphenidate, a central nervous system stimulant approved for ADHD in patients ≥6 years.

Mechanism

Blocks dopamine and norepinephrine reuptake in prefrontal cortex and striatum → ↑ synaptic availability → improved attention, impulse control, hyperactivity.

Indications & Dosing

Population	Starting Dose	Titration	Max Daily
Children 6–12 yr	2.5–5 mg once or twice daily	2.5–5 mg increments weekly	20 mg
Adolescents 13–17 yr	5–10 mg twice daily	5–10 mg increments weekly	40 mg (20 mg BID)

Give with or without food. Avoid late afternoon doses to prevent insomnia. Focalin XR (extended-release) available for once-daily dosing.

Common Side Effects (≥5%)

• Decreased appetite, weight loss, insomnia, abdominal pain, headache, nausea, irritability, tachycardia, hypertension.
• Growth suppression (monitor height/weight q3–6mo).

Serious Risks

• Cardiac: sudden death in structural heart disease; screen with history, exam, ± ECG.
• Psychiatric: new/worse bipolar, psychosis, mania; screen for family history.
• Peripheral vasculopathy: Raynaud's phenomenon.
• Abuse/dependence potential (Schedule II).

Contraindications & Precautions

• MAOI use within 14 days (hypertensive crisis).
• Glaucoma, motor tics/Tourette's, severe anxiety, agitation.
• Pregnancy Category C; excreted in milk.

Key Interactions

• Antihypertensives (may lose efficacy).
• SSRIs/SNRIs (serotonin syndrome risk, rare).
• Anticonvulsants (phenytoin, phenobarbital – PK interactions).
• Halogenated anesthetics (↑ arrhythmia risk).

Overdose

Agitation, tremor, hyperreflexia, convulsions, hyperthermia, rhabdomyolysis, cardiac arrhythmias, coma. Supportive care; benzodiazepines for seizures. No specific antidote.

Focalin is effective for ADHD but requires careful patient selection, monitoring, and integration with behavioral/educational interventions.