Otrivin 0.5% Nasal Drops is a decongestant medication containing xylometazoline hydrochloride used to provide temporary relief from nasal congestion due to colds, allergies, and sinusitis. The drops help reduce swelling in nasal passages, making breathing easier. This medication is intended for nasal use only. The 0.5% concentration is typically recommended for children between 2-12 years of age (adult strength is 1%). The drops should not be used for more than 7 consecutive days unless directed by a healthcare provider. Common side effects may include temporary burning, stinging, dryness in the nose, and sneezing. Consult a doctor before use in children under 2 years old or if you have high blood pressure, heart disease, diabetes, or thyroid problems.