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's painkilling and numbing qualities begin to take effect when the gas is inhaled at concentrations of 10 percent. At increasingly higher concentrations, a sense of well-being, or high, is experienced. A person experiencing a nitrous oxide high could: 1  Have slurred speech.