Naphazoline hydrochloride is widely used in the pharmaceutical industry as a decongestant. It is commonly found in over-the-counter eye drops and nasal sprays to relieve redness, irritation, and swelling caused by allergies, colds, or minor eye infections. The compound works by constricting blood vessels in the eyes and nasal passages, reducing inflammation and improving comfort. It is also utilized in veterinary medicine for similar purposes in animals. Additionally, it may be included in combination products with antihistamines or other active ingredients to enhance its therapeutic effects. Proper dosage is essential to avoid potential side effects such as rebound congestion or irritation with prolonged use.