So, diving with decongestants... I recently missed another dive due to a cold, I wasn't exactly ill - that had passed - but I still felt blocked up and unable to clear my ears. I've never taken decongestants and dived as it's not widely recommended, but some guys I know absolutely swear by it, providing you're not really ill (which throws up other matters way past blocked sinuses). So, question is, what do people feel about it? Ok if you're just a little bit ill? Ok if you're recovering from a cold? Never ok, why the hell would you take medication before a dive? My thoughts now are that it's ok if you're just freeing up sinuses but not actually ill, and providing you've taken the medication before and are aware of what effects it may have on you. However, issues: 1. If the medication wears off it could cause a reverse block. 2. Pseudoephedrine / phenylephrine can increase risk of oxygen toxicity, especially in high dosages As always, I appreciate everyone's views!