Using the experience of the sea and trace elements, STÉRIMAR has developed a specific hypertonic product for nasal congestion; INFORMATION: STÉRIMAR "Blocked nose" (Hypertonic) is a medical device and is recommended for children over three years old and adults to: Provide natural relief from nasal congestion (common colds, rhino pharyngitis, allergic rhinitis, sinusitis). Limit the risk of superinfection from the nasal cavity. Cleanse to enhance the action of medicated treatments. COMPOSITION: STÉRIMAR "Blocked nose" (Hypertonic) is a hypertonic* filtered sea water solution, natural, drug and preservative free. Rich in mineral salts and marine trace elements, with additional copper and manganese, STÉRIMAR "Blocked nose" (Hypertonic) limits the risk of infectious and allergic reactions. Hypertonic solution: a solution with a higher salt concentration than within the body cells, which allows natural nose decongestion ("the osmotic effect"). Sea water, Copper salt, Manganese salt, Purified water. RECOMMENDED USE: STÉRIMAR "Blocked nose" (Hypertonic) is recommended for a short period use. Once completed, STÉRIMAR "Nasal hygiene" (Isotonic) is then recommended. Prime the spray by briefly pressing the nozzle. Insert the nozzle into the nostril. Press the nozzle briefly - let any excess solution run out - then blow your nose.