Understanding Insomnia: Causes, Symptoms, and Effective Treatment Strategies

Acute vs. Chronic Insomnia

Feature	Acute (Adjustment) Insomnia	Chronic Insomnia Disorder
Duration	Days to <3 months	≥3 nights/week for ≥3 months
Triggers	Stress, illness, travel, caffeine, meds, environment	Often multifactorial; perpetuating factors dominate
Resolution	Usually spontaneous when trigger resolves	Requires targeted intervention

Common Causes of Chronic Insomnia

• Psychiatric: Anxiety, depression, PTSD, bipolar disorder.
• Medical: Chronic pain, GERD, COPD/asthma, heart failure, hyperthyroidism, nocturia, neurodegenerative disease.
• Medications: SSRIs/SNRIs, stimulants, beta-blockers, corticosteroids, diuretics, theophylline.
• Substances: Caffeine (after noon), alcohol (disrupts sleep architecture), nicotine.
• Circadian rhythm disorders: Delayed/advanced sleep phase, shift work, jet lag.
• Primary sleep disorders: Sleep apnea, restless legs syndrome, periodic limb movements.
• Maladaptive behaviors: Irregular schedule, excessive time in bed, clock-watching, napping.

Evidence-Based Treatments

First-Line: Cognitive Behavioral Therapy for Insomnia (CBT-I)

• Gold standard per AASM, ACP, VA/DoD guidelines.
• Components: Sleep restriction, stimulus control, cognitive restructuring, relaxation training, sleep hygiene education.
• Durable effects; no medication side effects; effective for comorbid insomnia.
• Access: In-person, telehealth, digital therapeutics (e.g., Somryst, Sleepio—FDA-cleared).

Pharmacologic Options (Short-Term / Adjunct)

Class	Examples	Key Considerations
Benzodiazepine receptor agonists (BzRAs)	Zolpidem, eszopiclone, zaleplon	Short-term use; risk of dependence, falls, complex sleep behaviors, next-day impairment.
Melatonin receptor agonist	Ramelteon	Sleep onset; no dependence; minimal abuse potential.
Orexin receptor antagonist	Suvorexant, lemborexant, daridorexant	Sleep maintenance; caution in narcolepsy; next-day somnolence.
Low-dose doxepin (3–6 mg)	Silenor	Sleep maintenance; H1 antagonism; minimal anticholinergic at low dose.
Off-label sedating antidepressants	Trazodone, mirtazapine	Commonly used; limited RCT evidence for primary insomnia.
OTC: Antihistamines	Diphenhydramine, doxylamine	Not recommended for chronic use; anticholinergic burden, tolerance.
OTC: Melatonin	0.5–5 mg	Circadian phase-shifting; weak for sleep maintenance; quality varies (supplement regulation).

When to Seek Professional Help

• Insomnia >3 months despite sleep hygiene efforts.
• Daytime impairment (fatigue, mood, cognition, safety).
• Suspected comorbid sleep disorder (apnea, RLS).
• Dependence on sleep aids.

Insomnia is treatable. CBT-I offers the best long-term outcomes. Start with a sleep medicine specialist or behavioral sleep psychologist.