Side effects of Decongestant drugs

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Decongestants should be used by taking the minimum effective dose. People who take too much or for too long may experience â€˜rebound congestionâ€™ as soon as they stop using it. This occurs when the blood vessels widen from being no longer constricted by the decongestant. It is more commonly caused by medicines applied directly such as creams or sprays.

Some preparations contain combinations of other drugs (such as antihistamines to reduce allergic responses), which may cause drowsiness.