Amitriptyline Hydrochloride: Brands, Price & Uses in Bangladesh

Amitriptyline hydrochloride is a tricyclic antidepressant (TCA) used for the following indications, classified by strength of evidence:

Established / Approved Use

• Major depressive disorder (MDD): Amitriptyline hydrochloride is approved for the relief of symptoms of depression, particularly endogenous depression, in adults.

Guideline-Supported / Commonly Used Off-Label Uses

• Neuropathic pain: Amitriptyline hydrochloride is widely recommended by pain-management guidelines as a first- or second-line agent for chronic neuropathic pain (e.g., diabetic neuropathy, post-herpetic neuralgia), used at doses lower than those used for depression.
• Chronic pain syndromes: Including fibromyalgia, often as part of a multimodal treatment plan (adjunct use).
• Migraine prophylaxis: Low-to-moderate dose Amitriptyline hydrochloride is used to reduce the frequency of migraine and tension-type headache.
• Insomnia: Low-dose Amitriptyline hydrochloride is used off-label for its sedative effect when other measures are inadequate; it is not a first-line treatment for insomnia.

Other Off-Label Use (Limited/Historical)

• Nocturnal enuresis in children: Historically used short-term in children when other measures fail; current use is limited due to cardiac toxicity risk in overdose, and it should only be initiated by a specialist with careful cardiac and psychiatric assessment.

The final decision on indication and duration of use must be individualized by a qualified physician.

Dosage of Amitriptyline hydrochloride must be individualized by a physician according to the indication being treated, the patient's age, and clinical response. See the Dosage table for indication-specific dosing and Administration for practical instructions on taking the medicine. Treatment is usually started at a low dose and increased gradually to minimize side effects, and should never be stopped abruptly without medical advice.

Common and serious side effects associated with Amitriptyline hydrochloride include:

Anticholinergic Effects (Common)

• Dry mouth
• Constipation
• Urinary retention
• Blurred vision

Central Nervous System

• Drowsiness/sedation
• Dizziness
• Tremor
• Confusion (especially in elderly)
• Lowered seizure threshold

Cardiovascular

• Orthostatic hypotension
• Tachycardia
• Cardiac conduction changes/arrhythmia (see Precautions and Overdose)

Metabolic/Other

• Weight gain
• Increased appetite
• Sweating
• Sexual dysfunction

Serious but less common effects include serotonin syndrome (in combination with other serotonergic drugs — see Interactions), suicidal thoughts/behavior in young people (see Precautions), and severe allergic reactions. Report any severe or persistent side effect to a physician promptly.