Hypertonic Sea Water Nasal Sprays and Vials

Launched in 1998, in France, as the first hypertonic sea water nasal spray in the market, Sinomarin® is, today, an expert in nasal care and a significant brand with presence in 40 international markets.

Sinomarin® is a clinically proven all natural nasal decongestant product line composed of a hypertonic sea water solution that is rich with the sea’s naturally occurring mineral salts and trace elements, and an effective nasal wash.

Due to its hypertonic nature, Sinomarin® relieves nasal congestion effectively (via the natural mechanism of osmosis), and restores nasal breathing and nasal function, naturally.

Sinomarin® cleanses the nasal cavities, washing-out excess mucus, infectious agents like viruses & bacteria, allergens, pollutants and other impurities, helping to protect from further ear-nose-throat infections and complications.

Its formula contains the optimum concentration of sea salt (2.3% NaCl) making the products both highly effective and comfortable to use. The 100% natural solution, free from drug substances, additives or preservatives, is ideal for the whole family, even for newborns, and those for whom medicated decongestants are contraindicated e.g. people with heart conditions, pregnant & breastfeeding women.

Sinomarin® products are trusted & recommended by healthcare professionals such as Paediatricians, ENT specialists, GPs, Allergists and pharmacists, and their efficacy, safety and tolerance have been proven clinically.

The sea water used in all Sinomarin® products is collected from the Bay of Cancale at the coast of Brittany in France. The area is renowned for its exceptional tidal range of over 15 meters and strong currents, thus, the sea water is continuously renewed and enriched, is free of any contaminants and is, as a result, of the finest quality. The quality of the sea water is continuously monitored by local official authorities.

Hypertonic E.N.T.
Hypertonic Adults
Hypertonic Children
Hypertonic Babies
Hypertonic Mini Spray
Isotonic Adults
Isotonic Children
Isotonic Mini

Sinomarin® has recently expanded its product offering with an innovative line of nasal sprays enriched with a novel ingredient complex –Algomer™ Complex-, a unique combination of sea algae extracts well-known for their biological properties.

Formulated for nasal use for the first time and covered by an global patent application, Sinomarin® Plus Algae line combines the natural decongestant action of hypertonic sea water (2.3% NaCl) with the well-documented properties of sea algae extracts present in Algomer™ Complex, that provide additional strength and protection to the nasal mucosa. The sum of its properties are valuable for the management of symptoms of nasal conditions such as allergic rhinitis, the common cold & the flu, amongst others.


Sinomarin® products are manufactured at Gerolymatos International’s facilities located in Northern Athens, Greece. The facility is compliant with the latest Good Manufacturing Practice (GMP) standards, including those of the U.S. FDA, and ISO certifications 9001:2015 & 13485:2016. Gerolymatos International ensures the best quality of the Sinomarin® product line in accordance with international guidelines & regulations.

Sinomarin® products are CE-marked Medical Devices that conform to the requirements of Directive 93/42 of the European Union and are protected by patents in a number of key territories.

Greek Export Awards Top Branded Export Product 2018: Gold for Sinomarin®