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CIRCADIN 2 mg PROLONGED-RELEASE TABLETS

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About the medicine

How to use CIRCADIN 2 mg PROLONGED-RELEASE TABLETS

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This page provides general information and does not replace a doctor’s consultation. Always consult a doctor before taking any medication. Seek urgent medical care if symptoms are severe.

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Introduction

Package Leaflet: Information for the Patient

Circadin 2 mg Prolonged-Release Tablets

Melatonin

Read all of this leaflet carefully before you start taking this medicine because it contains important information for you.

  • Keep this leaflet, you may need to read it again.
  • If you have any further questions, ask your doctor or pharmacist.
  • This medicine has been prescribed for you only. Do not pass it on to others. It may harm them, even if their signs of illness are the same as yours.
  • If you get any side effects, talk to your doctor or pharmacist. This includes any possible side effects not listed in this leaflet. See section 4.

Contents of the Package Leaflet:

  1. What is Circadin and what is it used for
  2. What you need to know before you take Circadin
  3. How to take Circadin
  4. Possible side effects
  5. Storage of Circadin
  6. Contents of the pack and other information

1. What is Circadin and what is it used for

The active substance of Circadin is melatonin and it belongs to a group of natural hormones produced by the body.

Circadin is used on its own for the short-term treatment of primary insomnia (persistent difficulty in falling asleep or staying asleep or poor quality sleep) in patients over 55 years of age. "Primary" means that the insomnia does not have any known cause, whether medical, mental or environmental.

Doctor consultation

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Discuss your symptoms and treatment with a doctor online.

2. What you need to know before you take Circadin

Do not take Circadin

  • if you are allergic to melatonin or any of the other ingredients of this medicine (listed in section 6).

Warnings and precautions

Consult your doctor or pharmacist before taking Circadin.

  • If you have liver or kidney problems. No studies have been conducted on the use of Circadin in people with liver or kidney disease; you should talk to your doctor before taking Circadin, as its use is not recommended.
  • If your doctor has told you that you have an intolerance to some sugars.
  • If you have been told that you have an autoimmune disease (when the body is "attacked" by its own immune system). No studies have been conducted on the use of Circadin in people with autoimmune diseases; therefore, you should talk to your doctor before taking Circadin, as its use is not recommended.
  • Circadin may cause drowsiness; you should be careful if you experience drowsiness, as it may affect your ability to perform tasks such as driving.
  • Tobacco may reduce the effectiveness of Circadin, as the components of tobacco smoke may increase the breakdown of melatonin in the liver.

Children and adolescents

This medicine should not be given to children or adolescents from 0 to 18 years, as it has not been evaluated in this population and its effects are not known. For administration to children from 2 to 18 years, another melatonin medicine may be more suitable; consult your doctor or pharmacist.

Taking Circadin with other medicines

Tell your doctor or pharmacist if you are taking, have recently taken or might take any other medicines. These medicines include:

  • Fluvoxamine (used to treat depression and obsessive-compulsive disorder), psoralens (used to treat skin diseases, such as psoriasis), cimetidine (used to treat stomach problems, such as ulcers), quinolones and rifampicin (used to treat bacterial infections), estrogens (used as contraceptives or in hormone replacement therapy) and carbamazepine (used to treat epilepsy).
  • Adrenergic agonists and antagonists (such as certain types of medicines used to control blood pressure by constricting blood vessels, nasal decongestants or medications to reduce blood pressure), opioid agonists and antagonists (such as some medications used in the treatment of addictions), prostaglandin inhibitors (such as non-steroidal anti-inflammatory drugs), antidepressants, tryptophan and alcohol.
  • Benzodiazepines and non-benzodiazepine hypnotics (medicines used to induce sleep, such as zaleplon, zolpidem and zopiclone)
  • Thioridazine (for the treatment of schizophrenia) and imipramine (for the treatment of depression).

Taking Circadin with food, drinks and alcohol

Take Circadin after you have eaten some food. Do not drink alcohol before, after or while taking Circadin, as it reduces the effectiveness of Circadin.

Pregnancy and breastfeeding

Do not take Circadin if you are pregnant, think you may be pregnant or are planning to have a baby. Consult your doctor or pharmacist before using this medicine.

Driving and using machines

Circadin may cause drowsiness. In this case, do not drive or operate machinery. Consult your doctor if you experience persistent drowsiness.

Circadin contains lactose monohydrate

Circadin contains lactose monohydrate. If your doctor has told you that you have an intolerance to some sugars, consult with them before taking this medicine.

3. How to take Circadin

Follow exactly the administration instructions of this medicine given by your doctor or pharmacist. In case of doubt, consult your doctor or pharmacist again.

The recommended dose is one tablet (2 mg) of Circadin per day, taken orally after eating some food, 1 or 2 hours before bedtime. This dose may be continued for up to thirteen weeks.

You should swallow the tablet whole. Circadin tablets should not be crushed or broken in half.

If you take more Circadin than you should

If you accidentally take more medicine than you should, go to your doctor or pharmacist as soon as possible.

Taking a higher dose than recommended per day may cause drowsiness.

If you forget to take Circadin

If you forget to take the tablet, take it as soon as you remember, before going to bed, or wait until the next dose and then continue as before.

Do not take a double dose to make up for forgotten doses.

If you stop taking Circadin

Stopping or ending treatment prematurely does not cause any known adverse effects. The use of Circadin does not cause withdrawal effects after treatment is finished.

If you have any other questions about the use of this medicine, ask your doctor or pharmacist.

Medicine questions

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4. Possible side effects

Like all medicines, this medicine can cause side effects, although not everybody gets them.

If you experience any of the following serious side effects, stop taking the medicine and contact your doctor immediately:

Uncommon:(may affect up to 1 in 100 people)

  • Chest pain

Rare:(may affect up to 1 in 1,000 people)

  • Loss of consciousness or fainting
  • Severe chest pain due to angina
  • Awareness of heartbeats
  • Depression
  • Visual impairment
  • Blurred vision
  • Disorientation
  • Dizziness (feeling of dizziness or "spinning")
  • Presence of red blood cells in the urine
  • Decreased number of white blood cells in the blood
  • Decreased number of platelets in the blood, which increases the risk of bleeding or bruising
  • Psoriasis

If you experience any of the following non-serious side effects, contact your doctor or pharmacist:

Uncommon:(may affect up to 1 in 100 people)

Irritability, nervousness, restlessness, insomnia, abnormal dreams, nightmares, anxiety, migraine, headache, lethargy (fatigue, lack of energy), restlessness associated with increased activity, dizziness, exhaustion, high blood pressure, abdominal pain, indigestion, mouth ulcers, dry mouth, nausea, alteration of blood composition that may cause a yellowish tint to the skin or eyes, skin inflammation, night sweats, itching, skin rash, dry skin, pain in the limbs, menopausal symptoms, feeling of weakness, glucose in the urine, excess protein in the urine, abnormal liver function and weight gain.

Rare:(may affect up to 1 in 1,000 people)

Herpes zoster, increased concentration of fat molecules in the blood, reduced calcium concentration in the blood, reduced sodium concentration in the blood, mood alteration, aggression, agitation, crying, stress symptoms, waking up early, increased libido (increased sexual desire), depressive mood, memory impairment, attention alteration, daydreaming, restless legs syndrome, poor quality sleep, sensation of pins and needles, increased tear production, dizziness when standing up or sitting down, hot flashes, acid reflux, digestive disorders, mouth ulcers, tongue ulcers, stomach discomfort, vomiting, abnormal intestinal sounds, gas, excessive saliva production, bad breath, abdominal discomfort, stomach disorders, stomach mucosa inflammation, eczema, skin redness, hand dermatitis, skin redness and itching, nail disorders, arthritis, muscle spasms, neck pain, nocturnal cramps, prolonged erection that may be painful, prostate inflammation, fatigue, pain, thirst, increased urine volume, need to urinate at night, increased liver enzymes, blood electrolyte abnormalities and laboratory test abnormalities.

Frequency not known:(cannot be estimated from the available data)

Hypersensitivity reaction, swelling of the mouth or tongue, skin swelling and abnormal milk secretion.

Reporting of side effects

If you get any side effects, talk to your doctor or pharmacist. This includes any possible side effects not listed in this leaflet. You can also report side effects directly via the national reporting system listed in Annex V. By reporting side effects, you can help provide more information on the safety of this medicine.

5. Storage of Circadin

Keep this medicine out of the sight and reach of children.

Do not use this medicine after the expiry date which is stated on the carton after EXP. The expiry date refers to the last day of the month shown.

Do not store above 25°C. Store in the original package to protect from light.

Medicines should not be disposed of via wastewater or household waste. Ask your pharmacist how to dispose of medicines no longer required. This will help protect the environment.

6. Contents of the pack and other information

Composition of Circadin

The active substance is melatonin. Each prolonged-release tablet contains 2 mg of melatonin.

The other ingredients (excipients) are ammonio methacrylate copolymer type B, calcium hydrogen phosphate dihydrate, lactose monohydrate, colloidal anhydrous silica, talc and magnesium stearate.

Appearance of the product and pack contents

Circadin 2 mg prolonged-release tablets are presented as biconvex, round, white or almost white tablets. Each carton of tablets contains a blister strip with 7, 20 or 21 tablets or a cardboard box with two blister strips with 15 tablets each (30 tablets in total). Not all pack sizes may be marketed.

Marketing authorisation holder and manufacturer

Marketing authorisation holder:

RAD Neurim Pharmaceuticals EEC SARL

4 rue de Marivaux

75002 Paris

France

Email: [email protected]

Manufacturer:

Responsible centres for batch release in the EEA:

Temmler Pharma GmbH & Co. KG

Temmlerstrasse 2

35039 Marburg

Germany

Iberfar - Indústria Farmacêutica S.A.

Rua Consiglieri Pedroso, n.o 121-123 - Queluz de Baixo

Barcarena, 2734-501

Portugal

Rovi Pharma Industrial Services, S.A.

Vía Complutense, 140

Alcalá de Henares

Madrid, 28805

Spain

You can obtain further information on this medicine by contacting the local representative of the marketing authorisation holder.

Belgium/Belgique/Belgien

Takeda Belgium

Tel: +32 2 464 06 11

[email protected]

Lithuania

RAD Neurim Pharmaceuticals EEC SARL

Tel: +33 185149776 (FR)

e-mail: [email protected]

RAD Neurim Pharmaceuticals EEC SARL

Τel: +33 185149776 (FR)

e-mail: [email protected]

Luxembourg/Luxemburg

Takeda Belgium

Tél/Tel: +32 2 464 06 11 (BE)

[email protected]

Czech Republic

RAD Neurim Pharmaceuticals EEC SARL

Tel: +44 7563543352 (UK)

e-mail: [email protected]

Hungary

RAD Neurim Pharmaceuticals EEC SARL

Tel: +33 185149776 (FR)

e-mail: [email protected]

Denmark

Takeda Pharma A/S

Tlf: +45 46 77 11 11

Malta

RAD Neurim Pharmaceuticals EEC SARL

Tel: +33 185149776 (FR)

e-mail: [email protected]

Germany

MEDICE Arzneimittel Pütter GmbH & Co. KG

Tel: +49 (0)2371 9370

[email protected]

Netherlands

Takeda Nederland b.v

Tel: +31 20 203 5492

[email protected]

Estonia

RAD Neurim Pharmaceuticals EEC SARL

Tel: +33 185149776 (FR)

e-mail: [email protected]

Norway

Takeda AS

Tlf: +47 800 800 30

[email protected]

Greece

TAKEDA ΕΛΛΑΣ Α.Ε.

Τηλ: +30 210 6387800

[email protected]

Austria

SANOVA PHARMA GesmbH

Tel.: +43 (01) 80104-0

e-mail: [email protected]

Spain

EXELTIS HEALTHCARE, S.L.

Tfno: +34 91 7711500

Poland

MEDICE Arzneimittel Pütter GmbH & Co. KG

Tel.: + 48-(0)22 642 2673

e-mail: [email protected]

France

BIOCODEX

Tél: +33 (0)1 41 24 30 00

e-mail: [email protected]

Portugal

Italfarmaco, Produtos Farmacêuticos, Lda.

Tel. +351 214 342 530

e-mail: [email protected]

Croatia

RAD Neurim Pharmaceuticals EEC SARL

Tel: +33 185149776 (FR)

e-mail: [email protected]

Romania

RAD Neurim Pharmaceuticals EEC SARL

Tel: +33 185149776 (FR)

e-mail: [email protected]

Ireland

RAD Neurim Pharmaceuticals EEC SARL

Tel: +33 185149776 (FR)

e-mail: [email protected]

Slovenia

RAD Neurim Pharmaceuticals EEC SARL

Tel: +33 185149776 (FR)

e-mail: [email protected]

Iceland

Vistor hf.

Simi: +354 535 7000

Slovakia

RAD Neurim Pharmaceuticals EEC SARL

Tel: +33 185149776 (FR)

e-mail: [email protected]

Italy

Fidia Farmaceutici S.p.A.

Tel: +39 049 8232222

e-mail: [email protected]

Finland

Takeda Oy

Puh/Tel: +358 20 746 5000

Cyprus

RAD Neurim Pharmaceuticals EEC SARL

Τηλ : +33 185149776 (FR)

e-mail: [email protected]

Sweden

Takeda Pharma AB

Tel: +46 8 731 28 00

[email protected]

Latvia

RAD Neurim Pharmaceuticals EEC SARL

Tel: +33 185149776 (FR)

e-mail: [email protected]

United Kingdom (Northern Ireland)

RAD Neurim Pharmaceuticals EEC SARL

Tel: +33 185149776 (FR)

e-mail: [email protected]

Date of last revision of this leaflet:{month YYYY}

Other sources of information

Detailed information on this medicine is available on the European Medicines Agency website: http://www.ema.europa.eu

Online doctors for CIRCADIN 2 mg PROLONGED-RELEASE TABLETS

Discuss questions about CIRCADIN 2 mg PROLONGED-RELEASE TABLETS, including use, safety considerations and prescription review, subject to medical assessment and local regulations.

5.0 (69)
Doctor

Tarek Agami

General medicine 11 years exp.

Dr. Tarek Agami is a general practitioner registered in both Portugal and Israel, with broad experience in family and preventive medicine. He offers online consultations for adults and children, providing personalised support for primary care needs, chronic disease management, and everyday health concerns.

Dr. Agami received clinical training and worked in leading medical institutions in Israel (Kaplan Medical Center, Barzilai Medical Center, Wolfson Medical Center) and Portugal (European Healthcare City, Viscura Internacional, Hospital Dr. José Maria Grande, Hospital Vila Franca de Xira). His approach combines international medical standards with individualised attention to each patient.

Main areas of consultation:

  • Diagnosis and treatment of acute and chronic conditions (high blood pressure, diabetes, respiratory infections, cardiovascular symptoms)
  • Evaluation of symptoms and guidance on further diagnostic testing
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  • Medical support during travel or after relocation
  • Treatment adjustments and lifestyle recommendations based on your personal history
Dr. Agami provides medical support for patients using GLP-1 medications (such as Ozempic or Mounjaro) as part of a weight loss strategy. He offers individualised treatment planning, regular follow-up, dose adjustment, and advice on combining medication with sustainable lifestyle changes. Consultations follow the medical standards accepted in Portugal and Israel.

Dr. Agami is committed to evidence-based, patient-centred care, ensuring that each person receives trusted medical support tailored to their health goals.

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Nuno Tavares Lopes

Family medicine 18 years exp.

Dr. Nuno Tavares Lopes is a licensed physician in Portugal with 17 years of experience in emergency medicine, family and general practice, and public health. He is the Director of Medical and Public Health Services at an international healthcare network and serves as an external consultant for the WHO and ECDC.

  • Emergency care: infections, fever, chest/abdominal pain, minor injuries, paediatric emergencies
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  • Sick leave (Baixa médica) connected to Segurança Social in Portugal
  • IMT medical certificates for driving licence exchange
Dr. Nuno Tavares Lopes provides medical support for patients using GLP-1 medications (Mounjaro, Wegovy, Ozempic, Rybelsus) as part of a weight loss strategy. He offers individualised treatment planning, regular follow-up, dose adjustment, and advice on combining medication with sustainable lifestyle changes. Consultations follow the medical standards accepted in Europe.

Dr. Lopes also provides interpretation of medical tests, follow-up care for complex patients, and multilingual support. Whether for urgent concerns or long-term care, he helps patients act with clarity and confidence.

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Anastasiia Hladkykh

Psychiatry 15 years exp.

Dr Anastasiia Hladkykh is a physician-psychotherapist and psychologist with over 14 years of experience working with individuals struggling with various types of addictions and their families. She provides online consultations for adults, combining medical knowledge with deep psychological support and practical tools.

Key areas of expertise:

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Experience and background:
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Doctor

Tomasz Grzelewski

Dermatology 21 years exp.

Dr Tomasz Grzelewski is an MD, PhD specialist in allergy, paediatrics, general practice and sports medicine, with a clinical focus on dermatology, endocrinology, allergology and sports-related health. He has more than 20 years of clinical experience and completed his medical training at the Medical University of Łódź, where he defended his PhD thesis with distinction. His doctoral research was recognised by the Polish Society of Allergology for its innovative contribution to the field. Throughout his career, he has gained extensive expertise in diagnosing and managing a wide range of allergic and paediatric conditions, including modern allergen desensitisation techniques.

For five years, Dr Grzelewski served as the Head of two paediatric departments in Poland, managing complex clinical cases and leading multidisciplinary teams. He also worked in medical centres in the United Kingdom, gaining experience across both primary care and specialist environments. With over a decade of telemedicine experience, he has provided online consultations across Europe and is valued for his clear, structured and evidence-based medical guidance.

Dr Grzelewski is actively involved in clinical programmes focused on modern anti-allergic therapies. As a Principal Investigator, he leads research projects on sublingual and oral allergen desensitisation, supporting evidence-based progress in allergy treatment for both children and adults.

In addition to his background in allergology and paediatrics, he completed dermatology studies through the Cambridge Education Group (Royal College of Physicians of Ireland) and a Clinical Endocrinology course at Harvard Medical School. This advanced training enhances his ability to manage skin manifestations of allergies, atopic conditions, urticaria, endocrine-related symptoms and complex immunological reactions.

Patients commonly seek his care for:

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  • general family medicine concerns
Dr Tomasz Grzelewski is known for his clear communication style, structured medical approach and ability to explain treatment options in a concise and accessible way. His multidisciplinary background across allergy, paediatrics, dermatology and endocrinology allows him to provide safe, up-to-date and comprehensive care for patients of all ages.
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Frequently Asked Questions

Is a prescription required for CIRCADIN 2 mg PROLONGED-RELEASE TABLETS?
CIRCADIN 2 mg PROLONGED-RELEASE TABLETS requires a prescription in Spain. You can check with a doctor online whether this medicine may be appropriate for your situation.
What is the active substance in CIRCADIN 2 mg PROLONGED-RELEASE TABLETS?
The active ingredient in CIRCADIN 2 mg PROLONGED-RELEASE TABLETS is melatonin. This information helps identify medicines with the same composition but different brand names.
Who manufactures CIRCADIN 2 mg PROLONGED-RELEASE TABLETS?
CIRCADIN 2 mg PROLONGED-RELEASE TABLETS is manufactured by Neurim Pharmaceuticals Ltd.. Pharmacy brands and packaging may differ depending on the distributor.
Which doctors can assess the use of CIRCADIN 2 mg PROLONGED-RELEASE TABLETS online?
Doctors such as Family doctors, Psychiatrists, Dermatologists, Cardiologists, Endocrinologists, Gastroenterologists, Pulmonologists, Nephrologists, Rheumatologists, Hematologists, Infectious disease physicians, Allergists, Geriatricians, Paediatricians, Oncologists may assess whether CIRCADIN 2 mg PROLONGED-RELEASE TABLETS is appropriate, depending on your situation and local regulations. You can book an online consultation to discuss your symptoms and possible next steps.
What are the alternatives to CIRCADIN 2 mg PROLONGED-RELEASE TABLETS?
Other medicines with the same active substance (melatonin) include CIRCADIN 2 mg PROLONGED-RELEASE TABLETS (30 tablets), MELATONIN ARROTEX 2 mg PROLONGED-RELEASE TABLETS, MELATONIN AUROVITAS 2 mg PROLONGED RELEASE TABLETS. These may have different brand names or formulations but contain the same therapeutic ingredient. Always consult a doctor before switching or starting a new medicine.
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