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Chemist Prices

armodafinil: Price, Dosage & Where to Buy

armodafinil is listed here as a drug. Listed status: Prescription-only medicine (POM). Pharmacologic class: wakefulness-promoting agent (R-isomer of modafinil).

This hub brings together dosage forms, pricing and purchase paths for this medicine. In the UK, armodafinil is classified as prescription-only.

Market availability can change over time, so treat the figures here as a snapshot, not a promise. Continue below for strengths, region pages and common questions.

Facts

Drug class
wakefulness-promoting agent (R-isomer of modafinil)
Active ingredient
armodafinil
Forms
Prescription-only medicine (POM)
Licensing status not on file

No generic version on file

armodafinil price estimates, the UK-licensed equivalent

Estimate, not a quote

  • 50 mg Prescription-only medicine (POM)

    £0.23 per tablet

    N/A

    Price estimate

    Where to buy
  • 150 mg Prescription-only medicine (POM)

    £0.60 per tablet

    N/A

    Price estimate

    Where to buy
  • 200 mg Prescription-only medicine (POM)

    £0.61 per tablet

    N/A

    Price estimate

    Where to buy
  • 250 mg Prescription-only medicine (POM)

    £0.69 per tablet

    N/A

    Price estimate

    Where to buy
£0.23 50 mg £0.60 150 mg £0.61 200 mg £0.69 250 mg
Estimated price per tablet by strength
All forms and prices
Price estimates by strength
Forms Price per unit
50 mg £0.23 / tablet
150 mg £0.60 / tablet
200 mg £0.61 / tablet
250 mg £0.69 / tablet

as of Oct 2, 2026 · Pricing methodology

Figures shown are an estimate, based on public UK pricing references such as the NHS Drug Tariff, not a price any one pharmacy has promised. The price at any one counter can differ from this figure, so use these figures for comparison only. A price that seems oddly cheap next to this range should be treated as a red flag for an unlicensed or unsafe seller.

This is a prescription-only medicine (POM). A valid UK prescription from a UK-registered prescriber is required before a pharmacy can dispense it.

Fill it at a pharmacy registered with the GPhC (Great Britain) or the PSNI (Northern Ireland).

armodafinil is regulated as a prescription-only medicine in the UK. A pharmacist is only able to release it against a valid prescription from a UK-registered prescriber.

If you do not have a current prescription, a qualified prescriber registered in the UK can issue one before the pharmacy can act on it. Pharmacies typically confirm the prescriber is registered in the UK first, as standard UK pharmacy practice.

About armodafinil

Armodafinil is a wakefulness-promoting medicine used to improve alertness in adults with excessive sleepiness linked to obstructive sleep apnoea, narcolepsy or shift work disorder. It treats sleepiness rather than the airway blockage in obstructive sleep apnoea, and normal alertness may not fully return during treatment. Armodafinil requires a prescription in the United Kingdom.

What armodafinil is used for

Armodafinil is used for excessive sleepiness in adults with obstructive sleep apnoea, narcolepsy or shift work disorder. Its purpose is to improve wakefulness in these conditions. In obstructive sleep apnoea, it treats sleepiness but does not treat the underlying airway blockage.

Where continuous positive airway pressure, known as CPAP, is the chosen treatment, the label calls for an adequate effort to use CPAP before armodafinil is started for sleepiness. Treatment does not necessarily restore normal alertness, so ongoing assessment of sleepiness remains necessary.

Dosage from the label

The label lists oral tablets in strengths of 50 mg, 150 mg, 200 mg and 250 mg. The label lists 150 mg to 250 mg once a day as a single morning dose for obstructive sleep apnoea or narcolepsy. The label lists 150 mg once a day as a single dose approximately one hour before the start of a work shift for shift work disorder.

The label lists doses up to 250 mg/day for obstructive sleep apnoea as well tolerated, but with no consistent evidence of additional benefit beyond 150 mg/day. The label lists a reduced dose for people with severe liver impairment. The label lists consideration of lower doses and close monitoring for older people.

These are label dosing facts, rather than a personal treatment plan. The appropriate regimen depends on the condition being treated and the prescriber's assessment.

How armodafinil works

Armodafinil belongs to a group of medicines called wakefulness-promoting agents. These medicines affect chemical signals in the brain that help regulate sleep and alertness. Armodafinil can reduce the removal of dopamine, a chemical messenger, from the spaces between nerve cells.

This helps support signals involved in staying awake. Its full wakefulness-promoting mechanism is not completely understood. Improving alertness does not remove the underlying airway blockage in obstructive sleep apnoea.

Main interactions

  • Hormonal contraceptives may be less effective during treatment and for one month after stopping; additional barrier or alternative non-hormonal contraception is recommended
  • Ciclosporin blood levels may fall, requiring monitoring and possible dose adjustment
  • Midazolam and triazolam exposure may fall, requiring possible dose adjustment
  • Phenytoin exposure may increase, and a dose reduction may be needed
  • Diazepam exposure may increase, and a dose reduction may be needed
  • Omeprazole, propranolol and clomipramine exposure may increase
  • Warfarin may require more frequent blood-clotting checks
  • Monoamine oxidase inhibitors require caution when used with armodafinil

Key warnings

  • Do not use with a known allergy to armodafinil, modafinil or any tablet ingredient
  • Stop treatment and seek medical advice at the first sign of rash, mouth sores, blistering or skin ulceration
  • A serious reaction affecting several organs can cause fever, swollen glands or facial swelling, even without a rash
  • Stop treatment and seek immediate medical help for facial or throat swelling, difficulty breathing or difficulty swallowing
  • Sleepiness may persist; avoid driving or dangerous activities if alertness remains impaired
  • Particular caution is needed with a history of psychosis, depression or mania
  • Existing heart or circulation disease may require increased monitoring
  • Animal studies suggest possible harm to an unborn baby

Pregnancy and breastfeeding

There are limited human pregnancy data, and these are insufficient to establish the risk of adverse pregnancy outcomes. Restricted growth in the womb and miscarriage have been reported in association with armodafinil and modafinil. Animal studies suggest that armodafinil may harm an unborn baby.

There are no data on armodafinil in human milk, its effects on breastfed infants or its effect on milk production. Modafinil was found in rat milk. Discuss pregnancy or breastfeeding with a doctor so that treatment needs and potential risks can be considered.

Missed dose

A missed dose may mean that sleepiness is less well controlled. Do not double a dose to make up for a missed dose.

Timing matters with a wakefulness-promoting medicine, as insomnia can occur. Ask a pharmacist or prescriber how to handle a missed dose, especially if it is close to the next scheduled dose or the usual sleep period.

Storage

The label specifies storage at 20° to 25°C. Keep the tablets out of the sight and reach of children, and follow the storage directions on the pack to maintain quality.

Pharmacies by area for armodafinil (UK-licensed equivalent)

Pharmacies near you

Use your location to open the pharmacies closest to you and ask them about armodafinil, the UK-licensed medicine with the same active ingredient.

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Frequently asked questions

Does armodafinil require a prescription in the United Kingdom?

Armodafinil requires a prescription in the United Kingdom. It is a wakefulness-promoting medicine used for excessive sleepiness in adults with obstructive sleep apnoea, narcolepsy or shift work disorder.

How much does armodafinil cost?

This page shows an estimate rather than a fixed price. Prices can vary, so the actual price should be confirmed with the pharmacy.

Does armodafinil treat the airway blockage in sleep apnoea?

Armodafinil treats excessive sleepiness associated with obstructive sleep apnoea, not the underlying blockage. Where CPAP is the chosen treatment, the label calls for an adequate effort to use it before starting armodafinil for sleepiness.

What drug class does armodafinil belong to?

The drug class on file for armodafinil: wakefulness-promoting agent (R-isomer of modafinil). Medicines in this class often share a similar mechanism.

Where is armodafinil sold?

Use the map and city pages on this site to find a location near you and ask them about armodafinil. Availability is not guaranteed at any single pharmacy, so call ahead.

First published October 2, 2026 · Last updated · Report an error on this page