Zopiclone Side Effects Explained

Zopiclone may cause mild side effects such as drowsiness, dry mouth, or dizziness. Most effects are temporary and reduce with short-term, correct use.

Zopiclone is a commonly used short-term treatment for insomnia. While it is effective in improving sleep quality and helping users fall asleep faster, it may also cause side effects in some individuals.

Most side effects are mild and temporary, but understanding them is important for safe use.

Common Side Effects

The most frequently reported side effects include:

Drowsiness or fatigue the next day
Bitter or metallic taste in the mouth
Dry mouth
Mild dizziness
Headache

These effects usually improve as the body adjusts to the medication.

Less Common Side Effects

Some users may experience:

Confusion or poor concentration
Memory issues (especially short-term memory)
Feeling groggy in the morning
Digestive discomfort

These effects are more likely at higher doses or in sensitive individuals.

Rare but Serious Side Effects

In rare cases, Zopiclone may cause:

Mood changes (anxiety, irritability, or depression)
Hallucinations or unusual thoughts
Sleepwalking or unusual nighttime behaviours
Allergic reactions

If any severe symptoms occur, medical attention should be sought immediately.

Who Is More Likely to Experience Side Effects?

Side effects may be more noticeable in:

Older adults
People with liver or kidney issues
Those taking higher doses
Individuals mixing Zopiclone with alcohol or other sedatives

How to Reduce Side Effects

To minimise unwanted effects:

Take only the prescribed dose (usually 7.5 mg)
Do not mix with alcohol
Ensure a full 7–8 hours of sleep after taking it
Use only for short-term treatment

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For more detailed medical safety information, refer to a trusted healthcare authority such as NHS or equivalent medical source.