Naratrex

Naratrex Uses, Dosage, Side Effects, Food Interaction and all others data.

Naratrex is a triptan drug that is selective for the 5-hydroxytryptamine1 receptor subtype. It is typically used for the treatment of migraine headaches.

Naratrex is a selective agonist of serotonin (5-hydroxytryptamine; 5-HT) type 1B and 1D receptors. It is structurally and pharmacologically related to other selective 5-HT1B/1D receptor agonist. Naratrex has only a weak affinity for 5-HT1A, 5-HT5A, and 5-HT7 receptors and no significant affinity or pharmacological activity at 5-HT2, 5-HT3 or 5-HT4 receptor subtypes or at alpha1-, alpha2-, or beta-adrenergic, dopamine1,; dopamine2; muscarinic, or benzodiazepine receptors. This action in humans correlates with the relief of migraine headache. In addition to causing vasoconstriction, experimental data from animal studies show that Naratrex also activates 5-HT1 receptors on peripheral terminals of the trigeminal nerve innervating cranial blood vessels, which may also contribute to the antimigrainous effect of Naratrex in humans.

Trade Name Naratrex
Availability Prescription only
Generic Naratriptan
Naratriptan Other Names Naratriptán, Naratriptan, Naratriptanum
Related Drugs Ubrelvy, Botox, diclofenac, celecoxib, metoclopramide, sumatriptan, Imitrex, Reglan
Weight 2.5mg, 1mg
Type Tablet
Formula C17H25N3O2S
Weight Average: 335.464
Monoisotopic: 335.166747749
Protein binding

28%-31% (over the concentration range of 50 to 1000 ng/mL)

Groups Approved, Investigational
Therapeutic Class
Manufacturer Sun Pharma
Available Country India
Last Updated: September 19, 2023 at 7:00 am
Naratrex
Naratrex

Uses

Naratrex is a 5-HT1B/1D receptor agonist used to treat migraines.

For the acute treatment of migraine attacks with or without aura in adults.

Naratrex is also used to associated treatment for these conditions: Migraine with acute onset aura, Acute Migraine without aura

How Naratrex works

Three distinct pharmacological actions have been implicated in the antimigraine effect of the triptans: (1) stimulation of presynaptic 5-HT1D receptors, which serves to inhibit both dural vasodilation and inflammation; (2) direct inhibition of trigeminal nuclei cell excitability via 5-HT1B/1D receptor agonism in the brainstem and (3) vasoconstriction of meningeal, dural, cerebral or pial vessels as a result of vascular 5-HT1B receptor agonism.

Toxicity

Symptoms of overdose include light-headedness, loss of coordination, tension in the neck, and tiredness.

Food Interaction

  • Take with or without food. The absorption is unaffected by food.

Naratrex Cholesterol interaction

[Major] The group of drugs known as 5-hydroxytryptamine1 receptor (5-HT1) agonists can cause vasospastic reactions, including coronary vasospasm, peripheral vascular ischemia, and colonic ischemia.

Rarely, serious adverse cardiac events including acute myocardial infarction, arrhythmia, cardiac arrest, and death have been reported within a few hours following the administration of 5-HT1 agonists, in some cases even in patients with no prior history or findings of coronary artery disease (CAD).

Significant elevation in blood pressure, including hypertensive crisis, has also been reported on rare occasions in patients with and without a history of hypertension, as have transient increases in blood pressure and peripheral vascular resistance.

In general, patients with potentially unrecognized CAD as predicted by the presence of risk factors (e.g., hypertension, hypercholesterolemia, tobacco use, obesity, diabetes, strong family history of CAD, female with surgical or physiological menopause, or male over 40 years of age) should not be administered 5-HT1 agonists unless a cardiovascular evaluation provides satisfactory clinical evidence indicating the lack of CAD, ischemic heart disease, or other significant underlying cardiovascular disease.

As a precaution, the manufacturers recommend that the first dose be administered under medical surveillance in such patients, and that electrocardiographic monitoring be considered during the interval immediately following administration to help detect any asymptomatic cardiac ischemia that may occur.

Periodic cardiovascular evaluations should be performed during intermittent, long-term use.

Volume of Distribution

  • 170 L

Elimination Route

Well absorbed (74% oral biovaility), absorption is rapid with peak plasma concentrations after 2-5 hours. The rate of absorption is slower during a migraine attack.

Half Life

5-8 hours

Clearance

  • 6.6 mL/min/kg

Innovators Monograph

You find simplified version here Naratrex

*** Taking medicines without doctor's advice can cause long-term problems.
Share