<prompt> The most effective medical treatment of nasal polypi is:Topical decongestant nasal dropsAnti-histaminicTopical steroidsNon-steroid anti-inflammatory drugs NSAIDs  <response>: Topical corticosteroids cause regression of nasal polypi. Anti-histaminic do not help in regressing polypi. NSAIDs can actually lead to formation of nasal polypi. 