Circadin SR (Melatonin) Information Disclaimer

Please note that we do not distribute or sell Circadin SR (Melatonin). The content provided on this webpage is intended solely for informational and educational purposes. It should not be construed as medical advice, diagnosis, or treatment recommendation. Always consult a qualified healthcare professional for personalised medical advice and treatment options.

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Circadin SR (Melatonin) - welzo
Circadin SR (Melatonin) - welzo

Circadin SR (Melatonin)

Circadin SR (Melatonin) - welzo
Circadin SR (Melatonin) - welzo
Sale price £28.00
In stock.

Circadin tablets are used to treat jet lag by helping you to regulate your sleep patterns. If...

Circadin tablets are used to treat jet lag by helping you to regulate your sleep patterns. If you've travelled across time zones, you will likely find it more difficult to get to sleep in your new time zone. Circadin contains melatonin, which is the hormone produced by the body to prepare it for sleep. Melatonin helps to regulate the body clock and natural production is triggered by darekness. 

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What is Circadin?

Circadin is a medication used to regulate sleep patterns especially after travelling through different time zones. It's most effective when treating jet lag as the active ingredient melatonin signals to your body that it's time to sleep.

How does it work?

Circadin tablets contain the hormone melatonin. Melatonin is released naturally in the body when it gets dark and tells your body that it should be sleeping. When you're travelling, your internal body clock has shifted and the body may not recognise that it's time to sleep. Using Circadin will ensure the body receives melatonin and begins to settle into sleep.

Is Circadin right for me?

Circadin is very useful when you have moved time zones, especially if the sun stays up longer, or goes down earlier compared to your home area. However, it may not be suitable for you if the following applies to you:

  • If you have liver or kidney problems
  • If you have been told by a doctor that you have intolerance to certain sugars
  • If you suffer with any auto-immune disease

The above list is not exhaustive, please consult a doctor before commencing any treatment with Circadin. 

The product images shown may represent the range of products, or be for illustration purposes only and may not be an exact representation of the product.

Side Effects

All medications can cause potential side effects, below we have listed some potential side effects, however these do not always occur.

  • Headaches
  • Dizziness
  • Drowsiness
  • Irritability
  • Abdominal pain

Disclaimer: This website does not constitute as medical advice, you should also consult with a doctor before taking medication. If you experience any major reactions to any medication you are taking, you must seek immediate medical attention.


Next Day Delivery Guarantee

All orders placed before 14:00 on weekdays will be delivered the next working day. For the majority of the UK, medication will be dispatched by Royal Mail, Monday to Friday, if ordered before 14:00. Dispatches are sent using Royal Mail's Next-Day Tracked 24-Hour service. We will email you tracking information directly and you should receive your order the day after dispatch.

Our Discreet Packaging Promise

We know that many of our customers turn to us when they need personal medication, preferring to use our online service rather than shopping for the product face to face. That is why our delivery is always discreetly packaged in plain brown boxes or envelopes. You will not have to worry about any content descriptions, and the package will be for your eyes only!


Commonly Used Dosage Guidelines for Circadin

Take one or two tablets just prior to bedtime on arrival at destination. Continue for a few days (maximum 5 days) until sleep pattern is established. 

Disclaimer: This website does not provide medical advice. No information listed on this website is intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of your physician or other qualified health care provider with any questions you may have regarding a medical condition or treatment before undergoing a new health care regimen, and never disregard professional medical advice or delay in seeking it because of something you have read on this website.

Product reviews

Please note the information below is intended for general knowledge, please read the patient information leaflet and/or the information provided by a healthcare professional for more specific guidance. This information should not substitute medical advice.

Can I get Circadin SR (Melatonin) on the NHS?

Whether or not you can get Circadin SR (Melatonin) on the NHS is dependent on your local guidelines and eligibility status. It is best to contact your local GP service if you are unsure of whether you can get Circadin SR (Melatonin) from the NHS.

Can you get Circadin SR (Melatonin) over the counter?

No, you can’t get Circadin SR (Melatonin) over the counter without a prescription or consultation. Circadin SR (Melatonin) is a regulated medication so all purchases need to have a prescription and/or suitable consultation form completed.

Can I buy Circadin SR (Melatonin) online even if I have never taken it before?

A prescribing pharmacist will need to review your consultation form before the medication can be dispatched.

Is Circadin SR (Melatonin) safe?

If you have been prescribed Circadin SR (Melatonin) then it is at the discretion of the prescriber.

However, all medications can potentially have adverse effects and should be taken exactly as prescribed. If you experience any side effects when taking Circadin SR (Melatonin) then you should contact a doctor immediately.

Are there any foods that should be avoided when taking Circadin SR (Melatonin)?

We recommend you read the patient information leaflet for this product thoroughly before taking the treatment. This is essential to understanding any interactions that can occur and to take the medication safely.

Can I buy Circadin SR (Melatonin) from Boots?

It is generally possible to purchase medication, including Circadin SR (Melatonin), from UK pharmacies like Boots. However, I recommend checking the Boots website or contacting Boots directly for the most current and accurate information. Remember to consult with a healthcare professional before starting any new medication.

Can I buy Circadin SR (Melatonin) from Superdrug?

If you would like to buy Circadin SR (Melatonin), you will need to check availability on the Superdrug website.

Can I buy Circadin SR (Melatonin) from Amazon?

Amazon does not sell medication such as Circadin SR (Melatonin), as they are not a pharmacy service provider. Always check with Amazon to see what they sell.

How long does Circadin SR (Melatonin) take to work?

The time it takes for a Circadin SR (Melatonin) to work can vary greatly depending on several factors, such as the strength, the individual's age, weight, and overall health, as well as any potential interactions with other medications or substances. Generally, the effects of Circadin SR (Melatonin) may be noticeable within the time frame outlined by the prescribing pharmacist. It is important to follow the prescribed dosage and instructions provided by your healthcare professional, and to consult them if you have any concerns or questions about the medication's efficacy or possible side effects.

How effective is Circadin SR (Melatonin)?

The effectiveness of Circadin SR (Melatonin) can vary significantly depending on various factors, such as the dosage, the condition being treated, the individual's age, weight, and overall health, as well as the presence of any other medications or substances that might interact with it. While some medications may be highly effective for certain individuals and conditions, others might experience a lesser degree of benefit or may require adjustments to the dosage or additional treatments to achieve the desired results.

What are the risks of taking Circadin SR (Melatonin)?

At Welzo, we are dedicated to providing our customers with accurate and comprehensive information about medications. We believe that understanding the potential risks and side effects associated with a medication is essential for making informed decisions about your health. This guide outlines some general considerations for assessing the risks of medication and includes references to the National Health Service (NHS) for further information.

  1. Read the Patient Information Leaflet (PIL): Every medication comes with a Patient Information Leaflet, which provides essential details about the drug, its uses, and potential side effects. Be sure to read this leaflet carefully before starting any new medication. The Electronic medicines compendium has a list of patient leaflets. you can visit by heading to
  2. Be aware of potential side effects: All medications have the potential to cause side effects, ranging from mild and short-lived symptoms to more serious, long-lasting issues. It's important to understand the possible side effects of a medication and how to manage them. The NHS has a helpful resource on managing medication side effects, while also speaking to a healthcare professional is important in understanding any potential risks of taking Circadin SR (Melatonin).
  3. Interactions with other medications: Some medications may interact with others, leading to increased side effects or reduced effectiveness. Make sure to inform your healthcare professional about all the medications and supplements you are currently taking. The NHS offers a useful tool for checking potential drug interactions here.
  4. Contraindications and precautions: Certain medical conditions or factors may make it unsafe for you to take a particular medication. Before starting any new medication, inform your healthcare professional about your medical history and any current health issues. The NHS provides more information about contraindications and precautions here.
  5. Appropriate use and dosage: It's crucial to follow the prescribed dosage and instructions for taking a medication to ensure its effectiveness and minimise the risk of side effects. The NHS has a useful guide on using medicines safely here.
  6. Monitoring and follow-up: Some medications require regular monitoring or follow-up appointments with your healthcare professional to ensure their safety and effectiveness. Be sure to schedule and attend these appointments as needed.

Can I buy Circadin SR (Melatonin) in the UK?

Yes, you can buy Circadin SR (Melatonin) in the UK with a valid prescription and or consultation form. Circadin SR (Melatonin) is available in the UK for purchase from local pharmacies with a valid prescription and or consultation. It is imperative that you ensure that the pharmacy you are buying the products from is licensed and registered with the General Pharmaceutical Council (GPhC).

Are Circadin SR (Melatonin) users satisfied with the product?

We have a list of reviews from customers taking Circadin SR (Melatonin) at the bottom of this page. For more information of the reviews of Circadin SR (Melatonin) head over to for further details.

Can I buy Circadin SR (Melatonin) from an online pharmacy?

This is dependent on your eligibility for the medication.

How much does Circadin SR (Melatonin) cost?

The costs of Circadin SR (Melatonin) are listed at the top of the page. Pricing is provided as a reference as we do not sell Circadin SR (Melatonin).

What is the dosage of Circadin for adults?

The recommended dosage of Circadin for adults is ONE to TWO tablets at bedtime on arrival at your destination for a maximum of 5 days.

When can I use Circadin?

It is best to take it at bedtime so that it does not interfere with your sleep.

Is this medication suitable for me?

Please get in touch with a doctor if you are unsure what medication is suitable for you. You can also complete our online consultation form to check your eligibility for the product.

How is the medication delivered?

All orders placed before 14:00 from Monday to Friday will be dispatched that day. The orders are sent using 24 Hour Tracked delivery provided by Royal Mail. Items will usually arrive the very next day after the order has been placed. We also provide tracking for your orders to check the status and location of your parcel. All our medication is packaged in plain confidential padded white or brown envelopes. This ensures that your orders are discreet, and the content of the orders will be for your eyes only.

What is the Circadin 2mg dose for a child?

There is no recommended dose for children. Circadin is not approved for use in children for jet lag. 

Does Circadin make you sleep?

There is no definitive answer to this question since everyone reacts differently to medication. However, Circadin is designed to help people with insomnia fall asleep and stay asleep. So, it is likely that it will make you sleepier than usual. If you have any concerns, be sure to speak with your doctor.

How do I order my medication?

Some products only require an online consultation which approximately takes 1 minute to complete, enabling you to then buy the product. Other products will also require a prescription; in this case, you will need to complete the online consultation, and then one of our partner pharmacy prescribers or doctors will review the online consultation questions and approve the order for delivery if you are eligible to purchase the item.

Can I cancel or return my order?

For non-medicinal products, you are eligible to return the product within 14 days of receipt in the same packaging you received. For medicinal products, you are eligible to cancel the order only until it has been dispatched. From that point forward, you are no longer eligible to return the order.

You have the right to cancel your order for medication up to the point when your medication is dispatched.

Customer Reviews

Based on 3 reviews
John Horrocks

You are very helpful movie with medication so thank you

Paz Sahagun

The convenience and reliability of's home pharmacy delivery service is unmatched.

Kerry Theodorov

Circadin has significantly improved my sleep pattern. It's easy to use and I've experienced no side effects. Highly recommend for anyone struggling with sleep issues.