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Modafinil 100mg Tablets: UK Information Guide

Summary

Detailed UK guide to modafinil 100mg — wakefulness-promoting medicine for excessive daytime sleepiness. Symptoms, mechanism, contraception warning, safety and FAQs.

KPBy Kamcenuk Pharmacy Team – UKPharmacist-reviewed · Kamcenuk medical content teamPublished 3 min read

Reviewed by the Kamcenuk medical content team · Last updated

Introduction


Modafinil 100mg tablets contain modafinil 100 mg, a wakefulness-promoting medicine used for excessive daytime sleepiness in conditions such as narcolepsy, shift-work sleep disorder and residual sleepiness in treated obstructive sleep apnoea. Related: Modafinil 200mg tablets. See also the comparison guide on modafinil vs armodafinil. This article is general information only — not personal medical advice.


What Is Modafinil?


Modafinil promotes wakefulness. It does not replace the body’s need for sleep and does not treat the root cause of sleep deprivation from poor habits. In the UK it is prescription-only for appropriate specialist-indicated use.


Symptoms — When Wakefulness Support Is Considered


  • Overwhelming daytime sleepiness despite adequate opportunity for night sleep
  • Sleep attacks or impaired alertness in narcolepsy
  • Shift-work related inability to stay awake during the scheduled work period
  • Residual sleepiness when obstructive sleep apnoea is already treated (e.g. with CPAP)


How Modafinil Works


Modafinil’s exact mechanism is not fully defined; it appears to affect dopamine transporters and other wake-promoting pathways in the brain. Onset and duration vary; it is usually taken in the morning to avoid night insomnia.


Important Safety Information


  1. Hormonal contraception — modafinil can reduce effectiveness; additional non-hormonal contraception is advised during treatment and for a period after stopping.
  2. Psychiatric history (anxiety, psychosis, bipolar) and cardiovascular disease require specialist assessment.
  3. Not for use in pregnancy; discuss plans with your doctor.
  4. Possible side effects: headache, nausea, anxiety, insomnia, dry mouth, raised blood pressure.
  5. Serious skin reactions are rare but require urgent medical care.


Important UK Information


Modafinil is prescription-only in the UK. Licensed indications centre on excessive sleepiness in specific sleep disorders. Online supply is typically personal import and does not replace specialist care.


Pack Sizes, Ordering and Delivery


On kamcenuk.com, Modafinil 100mg tablets is available in several pack sizes. Plain tracked UK delivery; standard 3–5 working days (free over £120).


Final Takeaway


Modafinil 100mg tablets is for indicated excessive daytime sleepiness under medical supervision — not a general “study drug” or substitute for sleep. This article is general information only.

This article is general information, not medical advice. Always consult a healthcare professional before starting any medication.

Frequently asked questions

Does modafinil replace sleep?+

No. It promotes wakefulness but the body still needs real sleep.

Effect on contraception?+

It can reduce hormonal contraception effectiveness. Use additional contraception as advised by a clinician.

Is this medical advice?+

No. Prescription-only context; specialist advice required.

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