Rhinocort Aqua (Budesonide) Dosage and Side Effects. RHINOCORT AQUA is used to treat seasonal allergic rhinitis (hay fever), perennial (year-round) rhinitis, and nasal polyps and to prevent new nasal polyps from appearing after surgery (polypectomy). Rhinocort Aqua (budesonide) is used to treat nasal congestion, sneezing and runny nose. Includes Rhinocort Aqua side effects, interactions and indications. Includes Rhinocort Aqua side effects, interactions and indications. INDICATIONS Treatment of Seasonal or Perennial Allergic Rhinitis. RHINOCORT AQUA (budesonide) Nasal Spray is indicated for the treatment of nasal symptoms of seasonal or perennial allergic rhinitis in adults and children six years of age and older. Note: This document contains side effect information about budesonide nasal. Some of the dosage forms listed on this page may not apply to the brand name Rhinocort Aqua. Rhinocort Aqua (budesonide) nasal spray is a steroid used to treat nasal symptoms such as congestion, sneezing, and runny nose caused by seasonal or year-round allergies. Read the leaflet that comes with the medicine or talk to your doctor or pharmacist if you want any more information about the possible side effects of Rhinocort aqua nasal spray. Nasal irritation, sore throat, nosebleeds, and cough are some of Rhinocort Aqua's common side effects. In most cases, side effects are minor and either don't require medical attention or can be easily treated. Find information about common, infrequent and rare side effects of Rhinocort Aqua Nasal. How to use Rhinocort Aqua Aerosol, Spray With Pump. If you are taking the over-the-counter product to self-treat, read and follow all directions on the product package before using this medication. Budesonide nasal inhaler-spray (Rhinocort Allegy, Rhinocort Aqua) is a drug prescribed to treat allergic rhininits and the treatment and prevention of nasal polyps. Common side effects include nasal bleeding, dough, and sore throat. Dosage and pregnancy and breastfeeding safety information are provided.