This is a local, phase IV, open-label, randomized, head to head study of children aged 3 to 7 years. The objective of the study is to compare the efficacy of a single dose of both diclofenac potassium and nimesulide in the reduction of fever and pain secondary to upper respiratory tract infection.

Inclusion Criteria:

• Children who present community acquired, non-complicated, upper respiratory tract infection: rhino-sinusitis, pharyngitis, tonsillitis, ear infection or the combination of these.
• Child must present axillary temperature ≥ 37.5°C.

Exclusion Criteria:

• Prior history of allergic reaction to the components of the study medication.
• Use of any NSAID or pharmacologic agent in the 24 hours prior to visit 1.
• Subjects who, in the opinion of the investigator, have developed, or are at risk of developing, a complicated infection and are not suitable subjects for the purposes of the study.

Other protocol-defined inclusion/exclusion criteria may apply