Click here for more information on Rhinocort from the manufacturer. Budesonide levels in plasma samples obtained from five infants at about 90 minutes after breastfeeding and about 140 minutes after drug administration to the mother were below quantifiable levels. However, following administration of 400 mcg of RHINOCORT AQUA Nasal Spray to male and female volunteers in pharmacokinetic study, no major gender differences in the pharmacokinetic parameters were found. It works by reducing swelling inflammation in the nasal passages. Back to top Side Effects Rarely, immediate and or delayed hypersensitivity reactions may occur after the intranasal administration of budesonide. The use of Rhinocort brand name and generic drugs should be done so only after receiving consultation, and written prescription by licensed physician. Budesonide nasal is used to treat nasal symptoms such as congestion, sneezing, rhinocort overdos and runny nose caused by seasonal or year-round allergies.