Medicines may be needed when symptoms of sinusitis are severe or do not improve. The goals of treatment with medicine are to: Treat the infection, which is usually caused by bacteria if your symptoms have lasted more than 7 to 10 days. Relieve pressure and pain caused by poor sinus drainage.
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Nitrous oxide is a colourless gas which is commonly used for sedation and pain relief, but is also used by people to feel intoxicated or âhighâ 1.