![]() The doctor may recommend antihistamines or an inhaled nasal steroid. ![]() Work with your doctor to control allergy symptoms. The researchers concluded that the recommended daily dose of pseudoephedrine should not be exceeded prior to diving, especially when diving deep or using gases other than air. It was also demonstrated that very large doses, achieved if a diver uses multiple over-the-counter drugs containing pseudoephedrine, may increase susceptibility to oxygen toxicity. The study indicated that normal doses of pseudoephedrine should not increase the risk of seizures in the majority of divers, but there was a huge individual variability in susceptibility to oxygen toxicity-sufficient variability to explain why divers sometimes get toxicity symptoms despite “safe” exposures. In 2013, DAN and the University of South Florida undertook an animal study on the possible effects of pseudoephedrine on mammals. Decongestant nasal sprays, such as oxymetazoline (Afrin), can cause rebound congestion when they wear off. Use of a decongestant might allow a diver to get to depth, but if the medication wears off during the dive it could cause a painful and dangerous reverse block or reverse squeeze.ĭecongestants can cause mild stimulation of the central nervous system and side effects such as nervousness, excitability, restlessness, dizziness, weakness, and a forceful or rapid heartbeat. Descending is optional ascending is mandatory.
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