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KORVALAZID

KORVALAZID

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Tomasz Grzelewski

Dermatology20 years of experience

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:

  • seasonal and perennial allergies
  • allergic rhinitis and chronic nasal symptoms
  • asthma and breathing difficulties
  • food and medication allergies
  • urticaria, atopic dermatitis and skin reactions
  • recurrent infections in children
  • sports-related health questions
  • 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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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 KORVALAZID

INSTRUCTIONS for medical use of the medicinal product NAPHTHYZIN®(NAPHTHYZIN®)

Composition

active substance: naphazoline; 1 ml of the preparation contains 0.5 mg or 1 mg of naphazoline nitrate; excipients: boric acid, purified water.

Pharmaceutical form

Nasal drops.

Main physical and chemical properties

Transparent, colorless or slightly yellowish liquid.

Pharmacotherapeutic group

Decongestants and other preparations for local use in diseases of the nasal cavity. Sympathomimetics. ATC code R01A A08.

Pharmacological properties

Pharmacodynamics

Naphthyzin®has a pronounced vasoconstrictive effect on peripheral vessels due to its effect on α-adrenergic receptors. When applied to mucous membranes, it reduces swelling, hyperemia, exudation, which helps to relieve nasal breathing in rhinitis. Naphazoline helps to open and expand the outlet ducts of the paranasal sinuses and Eustachian tubes, which improves the outflow of secretions and prevents the settling of bacteria.

Pharmacokinetics

When used locally, naphazoline is completely absorbed.

The therapeutic effect occurs within 5 minutes and lasts for 4-6 hours when used intranasally.

Clinical characteristics

Indications

Acute rhinitis. As an auxiliary agent in the inflammation of the paranasal sinuses and middle ear.

To reduce swelling of the mucous membrane during diagnostic intervention.

Contraindications

Increased sensitivity to any components of the medicinal product.

Dry inflammation of the nasal mucosa.

Interaction with other medicinal products and other types of interactions

The use of Naphthyzin®simultaneously with monoamine oxidase inhibitors (MAOIs), tricyclic antidepressants, maprotiline, or within several days after their cancellation may cause an increase in arterial pressure.

Special instructions

The medicinal product should be used with great caution in severe cardiovascular diseases (arterial hypertension, ischemic heart disease), in diabetes, hyperthyroidism, pheochromocytoma, concomitant use of MAOIs or other products that may have a hypertensive effect. Caution is necessary during general anesthesia using anesthetics that increase the sensitivity of the myocardium to sympathomimetics (e.g., halothane), as well as in bronchial asthma.

When using high doses of the preparation, the development of such side effects from the cardiovascular and nervous systems as palpitations, arterial hypertension, arrhythmia, headache, dizziness, drowsiness, or insomnia is possible.

It is essential to avoid prolonged use and overdose, especially in children. Prolonged use of preparations intended to relieve swelling of the mucous membrane may lead to swelling and subsequent atrophy of the nasal mucosa.

Use during pregnancy or breastfeeding

There are no data on the ability of naphazoline to penetrate the placental barrier or into breast milk. Therefore, before prescribing the preparation to women during pregnancy or breastfeeding, it is necessary to carefully consider all possible risks and benefits of treatment and prescribe the medicinal product only if it is absolutely necessary.

Ability to affect the reaction rate when driving vehicles or other mechanisms

The use of the Naphthyzin®medicinal product in recommended doses does not affect the ability to drive vehicles or mechanisms. When exceeding the recommended doses, dizziness and drowsiness are possible.

Method of use and doses

Naphthyzin®is instilled into each nasal passage, tilting the head slightly back and to the right when instilling into the right nostril and to the left when instilling into the left nostril.

For therapeutic purposes. Adults and children over 15 years old - 1-3 drops of 0.05%-0.1% solution into each nasal passage.

Children aged 3-6 years are instilled with a 0.05% solution, 1-2 drops into each nasal passage;

children aged 6-15 years - 2 drops into each nasal passage.

Naphthyzin®is used 3 times a day, but not more often than every 4 hours.

Naphthyzin®should not be used for more than 5 days in adults and more than 3 days in children.

Naphthyzin®can be used again only after a few days.

In case of nasal bleeding, use tampons moistened with a 0.05% solution of the preparation.

For diagnostic purposes (e.g., for the diagnosis and treatment of nasal polyps). After cleaning the nasal cavity, 3-4 drops of 0.05%-0.1% solution are instilled into each nasal passage or a tampon moistened in a 0.05%-0.1% solution is inserted for 2-3 minutes.

In case of swelling of the vocal cords, 1-2 ml of the preparation is injected with a laryngeal syringe.

Children

Children aged 3 to 15 years can use Naphthyzin®0.05%.

Children over 15 years old can use Naphthyzin®0.1%.

Overdose

Overdose or accidental ingestion of the preparation may cause systemic side effects: nervousness, increased sweating, headache, tremor, tachycardia, feeling of palpitations, arterial hypertension. Cyanosis, nausea, increased body temperature, spasms, cardiac arrest, pulmonary edema, mental disorders, pallor of the skin, heart attack may occur.

The suppressive effect on the central nervous system is manifested by such symptoms as decreased body temperature; bradycardia; increased sweating; drowsiness; shock-like hypotension; apnea; coma. The risk of overdose is higher in children, who are more susceptible to the negative effects than adults.

Treatment is symptomatic.

Side effects

When used in recommended doses, Naphthyzin®is usually well-tolerated. In patients with increased sensitivity, the medicinal product may rarely cause burning and dryness of the nasal mucosa. In isolated cases, a feeling of severe nasal congestion may occur.

Only in isolated cases does a systemic side effect occur (most often with overdose):

  • from the immune system: allergic reactions, including Quincke's edema, burning;
  • from the nervous system: nervousness, headache, tremor;
  • from the cardiovascular system: tachycardia, palpitations;
  • from the vascular system: arterial hypertension;
  • from the skin and subcutaneous tissue: increased sweating.

Prolonged (more than 5 days for adults and more than 3 days for children) or frequent use of the medicinal product may lead to habituation, which is accompanied by intense swelling of the nasal mucosa, occurring after a relatively short period of time after use. Long-term use of the preparation may cause damage to the epithelium of the mucous membrane, suppression of the activity of the epithelial cilia, and cause irreversible damage to the mucous membrane and the development of dry rhinitis.

Shelf life

3 years.

After opening the bottle, the shelf life of the preparation is 28 days.

Do not use the preparation after the expiration date stated on the packaging.

Storage conditions

Store in the original packaging at a temperature not exceeding 25 °C. Store in a place inaccessible to children.

Packaging

10 ml in a glass bottle. 1 bottle in a pack.

Release category

Without a prescription.

Manufacturer

Pharmaceutical company "Pharmak".

Location of the manufacturer and its address

Ukraine, 04080, Kyiv, Kyrylivska street, 74.

Online doctors for KORVALAZID

Discuss dosage, side effects, interactions, contraindications, and prescription renewal for KORVALAZID – subject to medical assessment and local rules.

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Doctor

Tomasz Grzelewski

Dermatology20 years of experience

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:

  • seasonal and perennial allergies
  • allergic rhinitis and chronic nasal symptoms
  • asthma and breathing difficulties
  • food and medication allergies
  • urticaria, atopic dermatitis and skin reactions
  • recurrent infections in children
  • sports-related health questions
  • 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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Dr Cayatte earned his degree from the University of Lisbon and taught internal medicine at Boston University School of Medicine. He holds active medical registrations in both Portugal and the UK and is a Fellow of the American Heart Association.

Consultations are available in English and Portuguese. Patients value his clarity, professionalism, and balanced approach to evidence-based care.

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If you are unsure about a diagnosis, preparing for surgery, or want to discuss your test results – Dr Yakovenko will help you evaluate your options and move forward with confidence.

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  • Certified in multiple evidence-based methods: CBT, NLP (Master Practitioner), Ericksonian hypnosis, symbol drama, art therapy, and systemic therapy.
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