doxin 25mg capsule - Doxepin (25mg) medicine

doxin 25mg capsule - Uses, Price, Side Effects & Substitutes

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๐Ÿญ Intas Pharmaceuticals Ltd ๐Ÿ“ฆ Varies by brand ๐Ÿ’Š Allopathy ๐Ÿ“… Updated: Jul 1, 2026
๐Ÿ“‹ Prescription Required ๐Ÿ’Š Generic Available
Medically Reviewed
SaathiMed Expert Panel | Jul 01, 2026

What is doxin 25mg capsule used for?

Sinequan (Doxepin) is used to treat NEURO CNS. It contains Doxepin (25mg), which Inhibits reuptake of serotonin and norepinephrine in the central nervous system,. Always consult your doctor before use. Take as prescribed.

  • Generic Name: Doxepin
  • Manufacturer: Intas Pharmaceuticals Ltd
  • Form: Allopathy
  • Pregnancy Category: C
  • Prescription Required: Yes
๐Ÿ’ก Did You Know? India has the highest number of USFDA-compliant plants outside the USA.

๐Ÿ’Š doxin 25mg capsule Uses & Benefits

Major depressive disorder; anxiety disorders; insomnia; chronic pain; neuropathic pain.

Off-label uses: Insomnia, chronic pain, fibromyalgia, migraine prophylaxis.

๐Ÿ“‹ Drug Information

Generic Name(s)Doxepin
Brand NameSinequan
ManufacturerIntas Pharmaceuticals Ltd
Packaging / FormVaries by brand (Allopathy)
Therapeutic ClassNEURO CNS
Action ClassTricyclic antidepressants
Route of AdministrationOral.
StorageStore at 20-25ยฐC (68-77ยฐF); protect from light and moisture.
Shelf LifeAs per manufacturer

๐Ÿ”ฌ Pharmacology (PK/PD)

Pharmacokinetics

AbsorptionWell absorbed from the gastrointestinal tract; peak plasma concentrations occur within 2-4 hours.
DistributionWidely distributed throughout the body; crosses the blood-brain barrier and placenta; appears in breast milk.
Protein BindingApproximately 80-85% bound to plasma proteins.
MetabolismExtensively metabolized in the liver via CYP450 enzymes, primarily CYP2D6 and CYP3A4; major active metabolite is nordoxepin.
Half-Life8-24 hours (parent drug); 28-52 hours (nordoxepin).
ExcretionPrimarily excreted in urine (as metabolites); small amount in feces.
BioavailabilityApproximately 13-45% due to first-pass metabolism.
Onset of Action1-2 weeks for antidepressant effect; immediate for sedative effects.
Peak Plasma Time2-4 hours.
Duration of Action24 hours.

How It Works

Inhibits reuptake of serotonin and norepinephrine in the central nervous system, increasing their levels in the synaptic cleft.

Mechanism Steps

1Inhibition of serotonin reuptake at presynaptic neuron
2Inhibition of norepinephrine reuptake at presynaptic neuron
3Blockade of histamine H1 receptors

๐Ÿ’ก How to Take doxin 25mg capsule

Follow your doctor's prescription exactly.

โš ๏ธ Side Effects of doxin 25mg capsule

โœ… Common Side Effects

  • Drowsiness
  • Dry mouth
  • Constipation
  • Blurred vision
  • Urinary retention
  • Weight gain

๐Ÿšจ Serious Side Effects

  • QT prolongation
  • Arrhythmias
  • Seizures
  • Serotonin syndrome
  • Suicidal ideation

โš ๏ธ Rare Side Effects

  • Agranulocytosis
  • Jaundice
  • Hepatitis
  • Extrapyramidal symptoms
  • Photosensitivity

Consult your doctor if you experience any unusual symptoms.

๐Ÿ”ฌ Drug Interactions

โš ๏ธ DrugSeverityEffect
MAOIs Major Risk of serotonin syndrome, hypertensive crisis
Warfarin Moderate Increased anticoagulant effect
CNS depressants Moderate Enhanced sedation and respiratory depression

๐Ÿšจ Major Interactions

  • MAOIs
  • Linezolid
  • Methylene blue
  • CYP2D6 inhibitors (e.g., fluoxetine, paroxetine)
  • CYP3A4 inhibitors (e.g., ketoconazole)

โšก Moderate Interactions

  • CNS depressants (e.g., alcohol, benzodiazepines)
  • Anticholinergic drugs
  • Sympathomimetics
  • Warfarin
  • Cimetidine

โ„น๏ธ Minor Interactions

  • Smoking
  • Barbiturates
  • Carbamazepine

๐Ÿฝ๏ธ Food Interactions

Grapefruit juice may increase levels; avoid excessive alcohol.

๐Ÿท Alcohol Interaction

Avoid alcohol; increased CNS depression and sedation.

๐Ÿ›ก๏ธ Safety & Warnings

๐Ÿšซ Contraindications

Hypersensitivity to doxepin or other tricyclic antidepressants; recent myocardial infarction; concurrent use of MAOIs; narrow-angle glaucoma; urinary retention.

๐Ÿ“Š Monitoring Parameters

Blood pressure, heart rate, ECG, liver function tests, serum drug levels, mental status.

๐Ÿคฑ Lactation Safety

Not recommended; excreted in breast milk, may cause sedation in infant.

๐Ÿ’Š Overdose Management

Activated charcoal; supportive care; sodium bicarbonate for arrhythmias; physostigmine for severe anticholinergic effects.

โฐ Missed Dose

Take as soon as remembered unless near next dose; do not double dose.

๐Ÿ‘จโ€โš•๏ธ Reviewed by Expert

SaathiMed Expert Panel

MD, PhD - Pharmacology

Reviewed: Jul 01, 2026

๐Ÿ”— View Profile

๐Ÿ”„ Substitutes for doxin 25mg capsule

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Alternative brands with exact same active ingredient (Doxepin (25mg)):

Medical Note: Always consult your doctor before switching medications.

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