Antidepressants for Anxiety and Insomnia: Medication Classes and Clinical Pearls

Several antidepressant classes treat comorbid anxiety and insomnia. Selection depends on symptom profile, side effect tolerance, comorbidities, and drug interactions.

SSRIs (First-Line for Anxiety)

• Sertraline, escitalopram, paroxetine, fluoxetine, citalopram.
• Insomnia: Can worsen initially; consider morning dosing, low start dose, short-term adjunctive hypnotic.
• Sexual dysfunction common; bupropion add-on may help.

SNRIs

• Venlafaxine XR, duloxetine, desvenlafaxine.
• Duloxetine also FDA-approved for chronic pain (fibromyalgia, diabetic neuropathy).
• Similar activation/insomnia risk as SSRIs; venlafaxine has discontinuation syndrome.

Sedating Antidepressants (Often Used at Low Dose for Sleep)

• Trazodone (25–100 mg HS): 5-HT2A antagonism + H1 blockade. Minimal anticholinergic; priapism risk (rare). Off-label for insomnia.
• Mirtazapine (7.5–15 mg HS): α2 antagonism + 5-HT2/3 + H1. Increases appetite/weight; good for anxiety + insomnia + poor appetite.
• Doxepin (3–6 mg HS): FDA-approved for insomnia (Silenor); potent H1 blockade at low dose.

Atypical / Other

• Bupropion: NDRI; activating, not for insomnia. Good for SSRI-induced sexual dysfunction, fatigue, ADHD comorbidity. Avoid in seizure/eating disorder history.
• Vilazodone, vortioxetine: Multimodal; less sexual dysfunction; activating.
• TCAs (amitriptyline, nortriptyline): Sedating but high anticholinergic/cardiac burden; 2nd/3rd line.

Non-Pharmacologic Essentials

• CBT-I (cognitive behavioral therapy for insomnia) — first-line for chronic insomnia.
• CBT for anxiety (GAD, panic, social).
• Sleep hygiene, regular exercise, caffeine/alcohol reduction.

Clinical Pearls

• Start low, go slow; warn about initial activation (weeks 1–2).
• Screen for bipolarity before prescribing antidepressants alone.
• Review all meds for interactions (CYP450, serotonergic load).
• Monitor for suicidality (black box warning <25 years).