Zopiclone for Insomnia: Complete UK Guide to Dosage, Side Effects & Safety (2026)

What Is Zopiclone?

Zopiclone is a prescription sleeping pill used for the short-term treatment of severe insomnia in the UK. It belongs to the “Z-drug” class and works by boosting gamma-aminobutyric acid (GABA), a chemical in the brain that has a calming effect.

Key facts:

How and When to Take Zopiclone

Dosage Instructions

1. Take one tablet just before going to bed

2. Swallow the tablet whole – do not crush or chew

3. You can take it with or without food

4. Your doctor may prescribe it for 2–3 nights per week rather than every night

5. Do not take more than your prescribed dose

What If You Miss a Dose?

• Skip the missed dose if it’s past bedtime

• Take your next dose at the usual time the next night

• Never take 2 doses at the same time

Common Side Effects of Zopiclone

Common (affect more than 1 in 100 people)

Serious Side Effects – Call 111 Immediately

• Poor memory (amnesia)

• Hallucinations (seeing/hearing things that aren’t real)

• Falling over (especially if over 65)

• Delusions or depression

• Signs of allergic reaction (swollen lips/throat, difficulty breathing)

Important Safety Warnings

Do NOT Mix Zopiclone With:

Don’t Drive If…

• Zopiclone makes you feel sleepy the next day

• You’re feeling dizzy, confused, or unsteady

Can You Stop Zopiclone Suddenly?

No. Do not suddenly stop taking zopiclone without telling your doctor, as you may get withdrawal symptoms.

Your doctor may suggest reducing your dose slowly to prevent withdrawal, especially if you’ve been taking it for more than a month.

Lifestyle Changes That Help Insomnia

Before or after zopiclone, try these evidence-based tips:

• Set regular times for going to bed and waking up

• Relax before bedtime – warm bath or calming music

• Use thick curtains, eye mask, earplugs to block light/noise

• Avoid caffeine, cigarettes, alcohol, heavy meals, and exercise a few hours before bed

• Don’t watch TV/use phones/tablets/computers just before bed

• No napping during the day

• Write down worries before bed to clear your mind

Who Can and Cannot Take Zopiclone?

Can Take (if prescribed)

• Adults with severe short-term insomnia

• Under doctor supervision for 2–4 weeks

Should Avoid or Use With Caution

• People with severe liver problems

• People with severe breathing problems (sleep apnoea)

• Pregnant or breastfeeding women (consult doctor)

• Adults over 65 (lower dose recommended)

Buying Zopiclone Legally in the UK

Zopiclone is a prescription-only medicine (POM) in the UK. Legitimate online pharmacies will:

• Require a valid prescription or online consultation with a registered doctor

• Be GPhC-registered (General Pharmaceutical Council)

• Display the GPhC logo with clickable verification

• Never sell without medical assessment

Avoid websites that sell zopiclone without prescription – these are illegal and may sell counterfeit or unsafe products.

When to See Your Doctor Again

Contact your doctor if:

• Insomnia continues after finishing your course

• Lifestyle changes don’t help

• Side effects are bothering you or don’t go away

• You need advice about stopping the medication

FAQs About Zopiclone

How long does zopiclone stay in your system?

Zopiclone typically starts working within 1 hour and helps you fall asleep faster. The exact half-life varies by individual.

Can zopiclone cause addiction?

Yes, long-term use can lead to dependence. That’s why it’s prescribed for only 2–4 weeks.

What if I take too much zopiclone?

Overdose can cause drowsiness, confusion, shallow breathing, or coma. Call 111 immediately even if you feel fine.