Zolpidem and zopiclone are prescription sedative-hypnotic medicines used for insomnia in countries where they are approved. Although both are commonly grouped with the so-called “Z-drugs,” they are different active ingredients and are not interchangeable.
Zolpidem is an FDA-approved prescription insomnia medicine in the United States. Zopiclone, meanwhile, is used as a prescription medicine in countries such as Canada, but zopiclone itself is not FDA-approved in the United States. The FDA distinguishes zopiclone from eszopiclone (Lunesta), which is an FDA-approved medicine.
Both medicines can affect alertness and carry important safety considerations. Choosing between them should therefore be based on a healthcare professional’s assessment rather than simply comparing which medicine appears stronger.
What Is Zolpidem?
Zolpidem is a prescription sedative-hypnotic used for certain forms of insomnia.
FDA-approved immediate-release zolpidem products are indicated for the short-term treatment of insomnia characterized by difficulty initiating sleep. Zolpidem acts as a positive modulator of GABA-A receptors, helping reduce neuronal activity and promote sleep.
Zolpidem is available in different formulations, including immediate-release and extended-release products. The appropriate formulation and dose depend on the patient’s symptoms and clinical circumstances.
What Is Zopiclone?
Zopiclone is a prescription sedative-hypnotic used for insomnia in several countries outside the United States.
Health Canada lists zopiclone as a prescription human medicine and includes tablet formulations such as 5 mg and 7.5 mg.
Zopiclone is chemically different from zolpidem but belongs to the broader group of non-benzodiazepine sedative-hypnotics commonly called Z-drugs.
An important distinction for US readers is that zopiclone itself has not been approved by the FDA. Eszopiclone is a separate active ingredient and should not be confused with zopiclone.
Zolpidem vs Zopiclone: Key Differences
| Feature | Zolpidem | Zopiclone |
|---|---|---|
| Drug class | Sedative-hypnotic / Z-drug | Sedative-hypnotic / Z-drug |
| Active ingredient | Zolpidem | Zopiclone |
| Primary use | Certain forms of insomnia | Insomnia |
| US FDA status | FDA-approved | Not FDA-approved |
| Available internationally | Yes | Yes |
| Mechanism | Modulates GABA-A receptors | Acts on GABA-related pathways |
| Formulations | Includes immediate-release and extended-release products | Commonly available as tablets |
| Prescription status | Prescription medicine | Prescription medicine in markets where approved |
| Important safety concern | Next-morning impairment and complex sleep behaviors | Drowsiness, impairment and other sedative effects |
| Suitable for everyone? | No | No |
The specific approved indications, strengths, formulations, and prescribing requirements vary by country.
How Do Zolpidem and Zopiclone Work?
Both medicines produce sedative effects through the GABAergic system, which is involved in regulating neuronal activity and sleep.
How Zolpidem Works
Zolpidem is a GABA-A receptor positive modulator. Its therapeutic effects are associated particularly with GABA-A receptors containing the alpha-1 subunit.
This activity reduces neuronal excitation and promotes the sedative effects needed to help with certain insomnia symptoms.
How Zopiclone Works
Zopiclone also acts through GABA-related mechanisms in the central nervous system. Its sedative effects can help promote sleep in patients for whom the medicine has been prescribed.
Although both medicines influence GABA-related activity, they are not the same drug and should not be treated as interchangeable alternatives.
Which One Works Faster: Zolpidem or Zopiclone?
There is no universal answer that applies to every patient.
The onset of a sleep medicine can be affected by:
- The specific formulation
- Dose
- Age
- Individual metabolism
- Food intake
- Other medications
- Underlying health conditions
- The type of insomnia being treated
Zolpidem immediate-release products are specifically taken immediately before bedtime according to prescribing information.
Rather than comparing medicines solely by how quickly they appear to work, a healthcare professional should consider the patient’s specific sleep problem and overall safety profile.
Zolpidem vs Zopiclone for Insomnia
The choice between zolpidem and zopiclone depends on the individual and the medicine’s approved use in the relevant country.
A healthcare professional may consider factors such as:
- Difficulty falling asleep
- Difficulty staying asleep
- Duration of insomnia
- Age
- Other medical conditions
- Other medications
- Previous response to sleep medicines
- Risk of next-day impairment
- Potential for misuse or dependence
- Local prescribing recommendations
There is no single sleeping medicine that is considered the best option for everyone.
How Long Do Zolpidem and Zopiclone Last?
The duration of effects can vary depending on the medicine, formulation, dose, and individual patient characteristics.
This is important because sedative effects can continue into the following morning.
The FDA warns that insomnia medicines can impair mental alertness and activities such as driving the following morning, even when a person feels fully awake.
Patients should therefore follow their prescribing instructions and avoid activities requiring full alertness if they experience drowsiness or impairment.
Zolpidem vs Zopiclone Side Effects
Both medicines can produce adverse effects because of their sedative properties.
Possible Zolpidem Side Effects
Potential effects can include:
- Drowsiness
- Dizziness
- Headache
- Fatigue
- Reduced alertness
- Coordination problems
- Memory-related effects
- Next-morning impairment
Zolpidem also carries an FDA boxed warning concerning complex sleep behaviors, including sleepwalking and sleep driving.
Possible Zopiclone Side Effects
Potential effects may include:
- Drowsiness
- Dizziness
- Headache
- Dry mouth
- Altered taste
- Reduced alertness
- Coordination difficulties
The exact adverse-effect profile depends on the product, dose, and individual patient.
Important Safety Warning: Complex Sleep Behaviors
Zolpidem and certain other prescription insomnia medicines have been associated with complex sleep behaviors.
These may include:
- Sleepwalking
- Sleep driving
- Preparing food while not fully awake
- Eating while asleep
- Performing other activities without full awareness
The FDA states that these behaviors can result in serious injuries and, in rare cases, death. Patients who experience such an event while taking a prescription Z-drug should stop the medicine and contact their healthcare professional immediately.
Can Zolpidem or Zopiclone Cause Next-Day Drowsiness?
Yes.
Both medicines can cause residual sedation or reduced alertness.
The risk is particularly important when performing activities such as:
- Driving
- Operating machinery
- Working at heights
- Handling equipment
- Performing safety-sensitive tasks
For zolpidem, the FDA has specifically highlighted the possibility of next-morning impairment, including impaired driving, even when the patient feels fully awake.
Can You Take Zolpidem and Zopiclone Together?
They should not be combined unless a qualified healthcare professional specifically directs you to do so.
Taking two sedative-hypnotic medicines together could increase sedation and impairment and may increase the risk of adverse effects.
Patients should tell their healthcare professional about all prescription medicines, over-the-counter medicines, sleep aids, supplements, and alcohol use before starting treatment.
Zolpidem vs Zopiclone: Which Is Better?
There is no universally better option.
The appropriate medicine depends on the patient’s condition, medical history, other medications, sleep pattern, treatment goals, and the regulatory status of the medicine in their country.
For example, zolpidem is an FDA-approved insomnia medicine in the United States, while zopiclone itself is not FDA-approved there.
Therefore, someone searching for “zolpidem vs zopiclone” should not interpret the comparison as a recommendation to switch between medicines independently.
Zolpidem vs Zopiclone in the USA
This distinction is particularly important for people in the United States.
Zolpidem is FDA-approved for certain insomnia indications. The FDA lists zolpidem among prescription Z-drugs used for insomnia.
Zopiclone itself is not FDA-approved in the United States. The FDA notes that zopiclone has been used as a sleep aid in other countries but has not been approved by the FDA.
Eszopiclone is a separate active ingredient and should not be confused with zopiclone.
Zolpidem vs Zopiclone: Which One Should You Take?
The answer depends on your individual medical circumstances.
A healthcare professional may consider:
- The type and severity of insomnia
- Your age
- Your medical history
- Other medicines you take
- Previous reactions to sleep medicines
- Risk of next-day impairment
- Potential interactions
- The approved medicines available in your country
Do not switch from zolpidem to zopiclone, or from zopiclone to zolpidem, without professional guidance.
Non-Medication Approaches for Insomnia
Medication is not the only approach to insomnia.
Depending on the cause and duration of sleep problems, treatment may also include:
- Cognitive behavioral therapy for insomnia (CBT-I)
- Consistent sleep and wake times
- Reducing caffeine later in the day
- Creating a comfortable sleep environment
- Limiting stimulating activities before bedtime
- Addressing underlying medical conditions
- Reviewing medicines that may interfere with sleep
For persistent insomnia, addressing the underlying cause can be more useful than simply changing from one sleeping medicine to another.
Frequently Asked Questions
Are zolpidem and zopiclone the same medicine?
No. Zolpidem and zopiclone are different active ingredients. Both are sedative-hypnotic medicines commonly grouped among the Z-drugs.
Is zolpidem approved in the USA?
Yes. Zolpidem is an FDA-approved prescription medicine for certain insomnia conditions.
Is zopiclone approved in the USA?
No. The FDA states that zopiclone has not been approved in the United States.
Is zopiclone the same as eszopiclone?
No. Zopiclone and eszopiclone are different active ingredients. Eszopiclone is the active ingredient in the FDA-approved insomnia medicine Lunesta.
Which is stronger, zolpidem or zopiclone?
It is not appropriate to describe one as universally “stronger.” Their effects depend on the medicine, formulation, dose, and individual patient.
Can zolpidem and zopiclone be taken together?
They should not be combined unless specifically prescribed or directed by a qualified healthcare professional.
Can these medicines cause next-day drowsiness?
Yes. Both are sedative-hypnotic medicines and may affect alertness. Zolpidem in particular has FDA warnings concerning next-morning impairment.
Can alcohol be taken with zolpidem or zopiclone?
Alcohol can increase sedative effects and impairment. Patients should avoid combining alcohol with these medicines unless their healthcare professional specifically advises otherwise.
What should I do if my insomnia continues?
Speak with a healthcare professional. Persistent insomnia may require evaluation of underlying causes and consideration of non-drug approaches such as CBT-I.
Key Takeaways
- Zolpidem and zopiclone are different medicines, although both are commonly classified as Z-drugs.
- Zolpidem is FDA-approved in the United States, while zopiclone itself is not FDA-approved in the US.
- Both medicines work through GABA-related pathways to produce sedative effects.
- Neither medicine is automatically the “best” choice for every person with insomnia.
- Both can cause drowsiness and impaired alertness.
- Zolpidem carries an FDA boxed warning regarding complex sleep behaviors such as sleepwalking and sleep driving.
- Patients should not combine or switch between these medicines without professional guidance.
- Persistent insomnia may require broader assessment and treatments such as CBT-I.
Conclusion
Zolpidem vs zopiclone is not simply a question of which sleeping pill is stronger or faster. They are different medicines with different regulatory statuses, formulations, pharmacological characteristics, and safety considerations.
Zolpidem is an FDA-approved prescription insomnia medicine in the United States, while zopiclone is used in several other countries but is not FDA-approved in the US.
If you are experiencing persistent insomnia or considering a change in sleep medication, discuss your options with a qualified healthcare professional. The appropriate treatment should be based on your individual symptoms, medical history, other medicines, and potential risks.
Medical Disclaimer
This article is intended for general educational purposes and does not replace professional medical advice, diagnosis, or treatment. Zolpidem and zopiclone are prescription medicines in jurisdictions where they are approved. Do not start, stop, combine, or switch prescription medicines without consulting a qualified healthcare professional.
