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CISTINE 250 mg TABLETS

Prescription review online

Prescription review online

A doctor will review your case and decide whether a prescription is medically appropriate.

Talk to a doctor about this medicine

Talk to a doctor about this medicine

Discuss your symptoms and possible next steps in a quick online consultation.

This page is for general information. Consult a doctor for personal advice. Call emergency services if symptoms are severe.
About the medicine

How to use CISTINE 250 mg TABLETS

Translated with AI

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 User

Cystine 250 mg Tablets

L-cystine

Read the package leaflet carefully before starting to take this medicine because it contains important information for you.

Follow the administration instructions of the medicine contained in this package leaflet or as indicated by your doctor or pharmacist.

  • Keep this package leaflet, as you may need to read it again.
  • If you need advice or more information, consult your pharmacist.
  • If you experience side effects, consult your doctor or pharmacist, even if they are side effects not listed in this package leaflet. See section 4.
  • You should consult a doctor if it worsens or does not improve after 15-30 days.

Contents of the Package Leaflet

  1. What Cystine Tablets are and what they are used for
  2. What you need to know before taking Cystine Tablets
  3. How to take Cystine Tablets
  4. Possible side effects

5 Conservation of Cystine Tablets

  1. Contents of the pack and additional information

1. What Cystine Tablets are and what they are used for

They contain an amino acid (component of proteins) that is part of keratin. Keratin is a fundamental constituent protein of the skin, hair, and nails.

Cystine is indicated in: Treatment of cystine deficiency (constituent of keratin), which could manifest with hair loss and/or nail fragility, caused by unbalanced or restrictive diets (weight loss, vegetarian, etc.).

Cystine Tablets are indicated in adults and adolescents over 14 years of age.

Doctor consultation

Not sure if this medicine is right for you?

Discuss your symptoms and treatment with a doctor online.

2. What you need to know before taking Cystine Tablets

Do not take Cystine:

  • if you are allergic to L-cystine or to any of the other components of this medicine (listed in section 6).
  • if you have cystinosis (hereditary disease with possible kidney stone formation).

Warnings and precautions

Consult your doctor or pharmacist before starting to take Cystine.

You should be cautious if you have disorders in the absorption or elimination of cystine.

Interference with analytical tests: If you are going to undergo any diagnostic test (including blood, urine, etc.), inform your doctor that you are taking this medicine, as it may alter the results.

Children

Do not administer this medicine to children under 14 years of age, as its safety and efficacy have not been established in children.

Taking Cystine with other medicines

Inform your doctor or pharmacist if you are taking/using, have recently taken, or may need to take any other medicine.

No drug interaction studies have been conducted with cystine.

Pregnancy and lactation

If you are pregnant or breastfeeding, think you may be pregnant, or plan to become pregnant, consult your doctor or pharmacist before taking this medicine.

As a precautionary measure, do not take Cystine during pregnancy or breastfeeding.

Driving and using machines

Cystine Tablets do not affect the ability to drive or operate machines.

Cystine Tablets contain cornstarch (gluten-free) and sucrose

This medicine contains sucrose. If your doctor has told you that you have an intolerance to certain sugars, consult with them before taking this medicine.

3. How to take Cystine Tablets

Follow the administration instructions of the medicine contained in this package leaflet or as indicated by your doctor or pharmacist. In case of doubt, ask your doctor or pharmacist.

The recommended dose is:

  • Adults and adolescents over 14 years of age:

Oral route.

It is recommended to take 4 to 6 tablets a day, divided into the three main meals.

The tablets should be taken during meals with a glass of water.

If the symptoms do not improve or worsen after 15-30 days of treatment, you should stop it and consult your doctor.

If you take more Cystine than you should

There is no information on cases of intoxication.

In case of overdose or accidental ingestion, consult your doctor or pharmacist immediately, or call the Toxicology Information Service, phone 91 562 04 20, indicating the medicine and the amount ingested (or go to a medical center).

If you forget to take Cystine

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

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

Medicine questions

Started taking the medicine and have questions?

Discuss your symptoms and treatment with a doctor online.

4. Possible side effects

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

No side effects have been described with the use of Cystine.

Reporting side effects

If you experience any type of side effect, consult your doctor, even if it is a possible side effect not listed in this package leaflet. You can also report them directly through the Spanish Medicines and Healthcare Products Agency (AEMPS) website: www.notificaRAM.es. By reporting side effects, you can help provide more information on the safety of this medicine.

5. Conservation of Cystine Tablets

No special storage conditions are required.

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

Do not use this medicine after the expiration date that appears on the packaging after CAD. The expiration date is the last day of the month indicated.

Medicines should not be disposed of through wastewater or household waste. Deposit the packaging and any unused medicines in the pharmacy's SIGRE point. In case of doubt, ask your pharmacist how to dispose of the packaging and any unused medicines. This will help protect the environment.

6. Contents of the pack and additional information

Composition of Cystine

  • The active ingredient is L-cystine. Each tablet contains 250 mg of L-cystine.
  • The other components (excipients) are: Cornstarch (gluten-free), sucrose, and talc.

Appearance of the product and contents of the pack

Cystine is presented in tablets; they are white and biconvex.

Each pack contains 40 tablets.

Marketing authorization holder and manufacturer

Marketing authorization holder

LA QUÍMICA MÉDICA, S.A.

Avda. de Sarriá, 146-148

08017 Barcelona

Tel. 93 203 21 51

Manufacturer

Noucor Health, S.A.

Avda. Camí Reial, 51-57

08184 Palau-solità i Plegamans (Barcelona)

Date of the last revision of this package leaflet: September 2013.

Detailed and updated information on this medicine is available on the website of the Spanish Agency for Medicines and Healthcare Products (AEMPS) http://www.aemps.es

Online doctors for CISTINE 250 mg TABLETS

Discuss questions about CISTINE 250 mg TABLETS, including use, safety considerations and prescription review, subject to medical assessment and local regulations.

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Doctor

Marta Reguero Capilla

Allergology 8 years exp.

Dr Marta Reguero Capilla is an allergist and immunologist who works with both adults and children. She specialises in the diagnosis, treatment, and ongoing management of allergic and immune-related conditions through online consultations. In her practice, Dr Reguero Capilla helps patients understand the causes of their symptoms, review test results, and choose appropriate treatment or monitoring strategies. Her consultations are suitable both for first-time assessments and for follow-up care over time. Patients commonly consult Dr Marta Reguero Capilla for: 

  • allergic rhinitis, seasonal allergies, and perennial allergy symptoms;
  • allergic conditions in adults and children;
  • bronchial asthma and allergy-related respiratory symptoms;
  • urticaria (acute and chronic) and angioedema;
  • food allergies and reactions to foods, additives, or medications;
  • atopic dermatitis, allergic rashes, and persistent itching;
  • unexplained or recurrent allergic reactions;
  • interpretation of laboratory tests, allergy testing, and immunology results;
  • immune system concerns, frequent infections, and reduced immune response;
  • ongoing medical follow-up and treatment adjustment.

Dr Reguero Capilla works in a structured and attentive manner, explaining medical decisions clearly and helping patients make informed choices about their own health or their child’s care. When clinically appropriate, she may provide recommendations for further tests or referrals that patients can use within Spanish medical networks, including Sanitas and DKV, in accordance with the terms and conditions of those services.

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€60
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Doctor

Sviatoslav Chekhun

Oncology 13 years exp.

Dr. Sviatoslav Chekhun is a medical oncologist with international clinical and research experience, specializing in modern medical oncology and a personalized approach to cancer treatment.

Currently (since 2025), he works as a Medical Oncologist at Institut Català d’Oncologia (Girona, Spain). Previously, he completed his residency in Medical Oncology and was involved in clinical research at Hospital Universitari Germans Trias i Pujol.

Dr. Chekhun has a strong academic and scientific background. He served as a lecturer in Internal Medicine at O.O. Bohomolets National Medical University and conducted research in experimental oncology at the R.E. Kavetsky Institute of Experimental Pathology, Oncology and Radiobiology.

Earlier in his career, he worked as a medical oncologist at the Kyiv City Clinical Oncological Center and contributed to regulatory evaluation of medicinal products at the State Expert Center of the Ministry of Health of Ukraine.

When to consult Dr. Chekhun:

  •  for diagnosis or clarification of a cancer diagnosis
  •  to obtain a second opinion on an existing treatment plan 
  •  when you need a personalized treatment strategy 
  •  for interpretation of test results, CT, MRI, PET-CT, and biopsies 
  •  when choosing between treatment options (chemotherapy, targeted therapy, immunotherapy) 
  •  in case of doubts about treatment strategy or disease progression 

Consultation format

Dr. Chekhun provides online consultations, where you can receive:

  •  expert second opinion 
  •  detailed case review 
  •  recommendations based on current international treatment guidelines 
  •  personalized treatment and follow-up plan 

Important:
Prescription and monitoring of medications must be carried out by your treating physician in an in-person (offline) setting. An online consultation does not replace a face-to-face visit but helps you make more informed decisions about your treatment.

Dr. Sviatoslav Chekhun combines clinical practice, research, and international experience, enabling him to provide patients with modern, evidence-based approaches in oncology.

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€280
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Frequently Asked Questions

Is a prescription required for CISTINE 250 mg TABLETS?
CISTINE 250 mg TABLETS does not require a prescription in Spain. You can check with a doctor online whether this medicine may be appropriate for your situation.
Who manufactures CISTINE 250 mg TABLETS?
CISTINE 250 mg TABLETS is manufactured by La Quimica Medica S.A.. Pharmacy brands and packaging may differ depending on the distributor.
Which doctors can assess the use of CISTINE 250 mg 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 CISTINE 250 mg 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 CISTINE 250 mg TABLETS?
Other medicines with the same active substance () include CARGLUMIC ACID TILLOMED 200 mg DISPERSIBLE TABLETS, CARGLUMIC ACID WAYMADE 200 mg DISPERSIBLE TABLETS, AMVERSIO 1 G ORAL POWDER. 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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