it depends on which products you are using. over-the-counter (otc) products have directions on the label with age-specific dosage instructions as well as uses warnings and possible side effects and storage information. decongestant ointments and sprays can cause rebound nasal congestion if used for an extended period of time. if you ever have questions about over-the-counter medications be sure to ask your pharmacist.
how often can i use medicated sprays or drops?