Zopiclone Side Effects

Zopiclone side effects are important to understand before using this sleeping pill for insomnia. Zopiclone may help some people fall asleep or stay asleep in the short term, but it can also cause unwanted effects such as bitter taste, dry mouth, next-day drowsiness, dizziness, confusion, memory problems, dependence, and withdrawal symptoms.

Most zopiclone side effects are mild and temporary, especially when the medicine is used correctly for a short time. However, some side effects can be serious, especially if zopiclone is mixed with alcohol, opioids, benzodiazepines, pregabalin, gabapentin, or other sedating medicines.

This guide explains zopiclone side effects in a realistic UK-focused way, including common side effects, serious warning signs, long-term risks, alcohol interactions, product guidance, and when to seek medical advice.

What Are the Main Zopiclone Side Effects?

The most common zopiclone side effects include a bitter or metallic taste, dry mouth, and feeling tired, sleepy, dazed, or less alert the next day.

Less common but more serious zopiclone side effects may include breathing problems, sleepwalking, unusual sleep behaviours, allergic reaction, confusion, hallucinations, low mood, or thoughts of self-harm.

Zopiclone should be used only as directed. Do not drink alcohol while taking it, and do not drive or use machinery if you feel sleepy, dizzy, dazed, or less alert.

Zopiclone Side Effects at a Glance

What Is Zopiclone?

Zopiclone is a prescription sleeping pill used for short-term insomnia. It belongs to a group of medicines called Z-drugs. These medicines affect calming signals in the brain and may help people fall asleep faster, stay asleep longer, or reduce night-time waking.

Zopiclone is usually considered when sleep problems are severe, short-term, and affecting daily life. It is not designed as a long-term cure for insomnia.

People may use zopiclone for:

• Difficulty falling asleep

• Waking during the night

• Waking too early

• Short-term severe insomnia

• Sleep disruption linked with stress

• Sleep problems affecting daily function

For a wider guide, read: Sleeping Pills and Their Side Effects in the UK

Why Zopiclone Side Effects Happen

Zopiclone works by calming activity in the brain. This can help sleep, but the same calming effect can also affect alertness, balance, memory, coordination, mood, and breathing in some people.

A simple way to understand it: zopiclone helps turn down the brain’s wakefulness. If that effect is too strong, or if the person is sensitive to it, zopiclone side effects may appear.

Side effects are more likely if:

• The dose is too strong

• The person does not get enough sleep time

• Alcohol is used

• Other sedating medicines are taken

• The person is older or frail

• There are breathing problems

• There is liver disease

• Zopiclone is used for too long

Common Zopiclone Side Effects

Common zopiclone side effects are usually uncomfortable rather than dangerous, but they should still be monitored.

Bitter or Metallic Taste

A bitter or metallic taste is one of the most recognised zopiclone side effects. Some people notice it soon after taking the tablet, while others notice it the next morning.

Helpful steps may include:

• Drinking water

• Brushing teeth before bed

• Using sugar-free gum in the morning

• Avoiding alcohol

• Speaking with a pharmacist if it continues

Dry Mouth

Dry mouth can happen because zopiclone may reduce saliva or make the mouth feel dry during sleep.

Helpful steps may include:

• Sipping water

• Avoiding alcohol

• Avoiding smoking

• Using sugar-free lozenges

• Keeping water beside the bed

• Speaking with a pharmacist if it is persistent

Next-Day Drowsiness

Next-day drowsiness is one of the most important zopiclone side effects because it can affect driving, work, concentration, and safety.

You may feel:

• Sleepy

• Heavy-headed

• Dazed

• Slow

• Less alert

• Unsteady

• Poorly focused

Do not drive, ride a bike, use tools, or operate machinery if you feel affected.

Dizziness

Dizziness can happen with zopiclone, especially when standing up, walking during the night, or waking too early after taking it.

If dizziness happens:

• Sit or lie down

• Avoid sudden standing

• Avoid alcohol

• Do not drive

• Speak with a doctor or pharmacist if it continues

For more detail, read: Can Sleeping Pills Cause Dizziness?

Common vs Serious Zopiclone Side Effects

Less Common Zopiclone Side Effects

Some zopiclone side effects are less common but still possible.

These may include:

• Headache

• Nausea

• Vomiting

• Fatigue

• Poor concentration

• Confusion

• Memory problems

• Nightmares

• Mood changes

• Reduced coordination

• Feeling emotionally flat

• Anxiety when the medicine wears off

If side effects bother you or do not go away, speak with a pharmacist or doctor.

Serious Zopiclone Side Effects

Serious zopiclone side effects are less common, but they need attention.

Seek urgent medical advice if you notice:

• Difficulty breathing

• Severe confusion

• Hallucinations

• Delusions

• Severe low mood

• Thoughts of self-harm

• Sleepwalking

• Eating or talking while not fully awake

• Driving while not fully awake

• Severe allergic reaction

• Swollen tongue or throat

• Rash with breathing difficulty

• Difficulty waking up

• Suspected overdose

Do not ignore mental health changes while taking zopiclone. If someone has thoughts of self-harm, urgent support is needed.

Zopiclone Side Effects and Driving

Zopiclone can affect driving the next day. This is especially likely if:

• You took it late at night

• You woke up too early

• You feel sleepy or dazed

• You mixed it with alcohol

• You take other sedating medicines

• You are sensitive to sleeping pills

Do not drive if you feel sleepy, dizzy, slow, confused, or less alert. Driving while impaired can be dangerous.

Zopiclone Side Effects and Alcohol

Alcohol can make zopiclone side effects much worse. This combination can increase sedation, confusion, blackouts, falls, breathing problems, and difficulty waking up.

Avoid alcohol completely while taking zopiclone.

For a full safety guide, read: Zopiclone and Alcohol

Zopiclone Side Effects by Risk Factor

Long-Term Zopiclone Side Effects

Zopiclone is usually intended for short-term use. Long-term or regular use can increase risks.

Possible long-term concerns include:

• Tolerance

• Dependence

• Withdrawal symptoms

• Rebound insomnia

• Memory problems

• Reduced confidence sleeping without tablets

• Increased fall risk

• Using higher doses than advised

• Mixing with alcohol or sedatives

• Anxiety when trying to stop

If zopiclone has become part of your routine, speak with a healthcare professional before changing anything.

Zopiclone Dependence and Withdrawal

Dependence means the body has become used to zopiclone. Withdrawal can happen if someone stops suddenly after regular use.

Possible warning signs of dependence include:

• Feeling unable to sleep without zopiclone

• Taking it more often than advised

• Taking extra doses

• Feeling anxious if you miss a dose

• Using it for stress rather than sleep

• Rebound insomnia when stopping

• Searching for stronger strengths

Possible withdrawal symptoms include:

• Rebound insomnia

• Anxiety

• Irritability

• Sweating

• Tremors

• Headache

• Nausea

• Panic symptoms

• Confusion

• Seizures in severe cases

Do not stop regular zopiclone suddenly unless a healthcare professional tells you to.

For more detail, read: Zopiclone Withdrawal Symptoms

Can Zopiclone Cause Weight Gain?

Weight gain is not usually considered a common direct zopiclone side effect. However, insomnia, appetite changes, reduced activity, alcohol use, stress, depression, anxiety, and other medicines can affect body weight while someone is using sleep medication.

Read the full guide: Can Zopiclone Cause Weight Gain?

Zopiclone 3.75mg vs 7.5mg Side Effects

Do not increase your dose yourself. If zopiclone is not working, speak with a pharmacist or doctor.

Safe Product Guidance for Zopiclone 7.5mg

For product-focused visitors, product pages should be used as product information and strength guidance, not as a replacement for medical advice.

You can review Zopiclone 7.5mg UK Brand product information for strength and product details.

Important safety note: do not increase the dose yourself. Do not combine zopiclone with alcohol, opioids, benzodiazepines, pregabalin, gabapentin, or other sedatives unless a prescriber has reviewed the risks.

How to Reduce Zopiclone Side Effects

You may reduce the chance of zopiclone side effects by following safer use habits.

Helpful steps include:

• Take it only as advised

• Take it only before bed

• Allow enough time for sleep

• Avoid alcohol completely

• Avoid extra doses

• Avoid mixing with sedatives

• Do not drive if sleepy the next day

• Speak with a pharmacist if side effects continue

• Review use if taking it regularly

• Ask for help if you feel dependent

Do not use zopiclone as a long-term sleep routine without medical review.

Safer Long-Term Sleep Support

Zopiclone may help short-term insomnia, but long-term sleep improvement usually needs a wider plan.

Helpful sleep support may include:

• CBT-I

• Regular wake time

• Morning daylight

• Lower caffeine intake

• Reduced alcohol

• Relaxation breathing

• Treating anxiety

• Treating depression

• Pain review

• Sleep apnea screening

• Better sleep hygiene

If zopiclone stops working well, read: Why Do Sleeping Pills Stop Working?

When Should You Seek Medical Advice?

Speak with a doctor, pharmacist, or NHS 111 if:

• Zopiclone side effects bother you

• Side effects do not go away

• You feel very sleepy the next day

• You feel dizzy or confused

• You have memory problems

• You have unusual sleep behaviours

• You drank alcohol while taking zopiclone

• You take opioids or benzodiazepines

• You have sleep apnea symptoms

• You feel dependent on zopiclone

• You want to stop zopiclone

• Your insomnia is getting worse

• You feel low, depressed, or unsafe

Seek urgent help if there is slow breathing, blue lips, severe confusion, hallucinations, severe allergic reaction, fainting, seizure, overdose symptoms, difficulty waking, or thoughts of self-harm.

Frequently Asked Questions

What are the most common zopiclone side effects?

The most common zopiclone side effects include dry mouth, bitter or metallic taste, and feeling tired, sleepy, dazed, or less alert the next day.

Can zopiclone make you tired the next day?

Yes. Next-day tiredness is one of the main zopiclone side effects. Do not drive or use machinery if you feel sleepy, dazed, dizzy, or less alert.

Can zopiclone cause a metallic taste?

Yes. A bitter or metallic taste is a common zopiclone side effect.

Can zopiclone cause dry mouth?

Yes. Dry mouth is one of the common zopiclone side effects. Drinking water and using sugar-free lozenges may help.

Can zopiclone cause dizziness?

Yes. Some people feel dizzy or light-headed after taking zopiclone, especially if they wake during the night or feel drowsy the next day.

Can zopiclone cause serious side effects?

Yes. Serious zopiclone side effects can include breathing problems, severe confusion, sleepwalking, allergic reaction, hallucinations, low mood, or thoughts of self-harm.

Can alcohol make zopiclone side effects worse?

Yes. Alcohol can make zopiclone side effects much worse and may cause breathing problems or make it difficult to wake up.

Can zopiclone cause dependence?

Yes. Zopiclone can cause tolerance, dependence, and withdrawal symptoms, especially with regular or long-term use.

How long should zopiclone be used?

Zopiclone is usually used short term. Long-term use should be reviewed by a healthcare professional.

Where can I check zopiclone product information?

You can review Zopiclone 7.5mg UK Brand product information on the product page, but medical suitability and safety guidance should always come first.

Conclusion

Zopiclone side effects can include bitter taste, dry mouth, next-day drowsiness, dizziness, poor concentration, confusion, memory problems, unusual sleep behaviours, dependence, withdrawal, and serious breathing or mental health symptoms in rare cases.

The safest approach is to use zopiclone only as advised, avoid alcohol, avoid unsafe medicine combinations, do not drive if affected, and speak with a doctor or pharmacist if zopiclone side effects are strong, persistent, or worrying.