<qa>  What was the dose of diclofenac potassium or placebo?Test and control groups were administered either diclofenac potassium 50 mg or placebo gel caps containing inactive filler of starch flour and carboxymethylcellulose, respectively, b.i.d. after a meal for 6 months in a cyclic regimen. Administration of diclofenac potassium or placebo was undertaken from baseline to 2 months, no drug diclofenac potassium or placebo was administered from 2 to 4 months, then diclofenac potassium or placebo therapy was reinstituted b.i.d. from 4 to 6 months. To promote compliance, each patient was recalled monthly. Patients in both groups were instructed on oral hygiene, including tooth brushing for at least 2 minutes b.i.d. and daily interdental cleaning. SRP was not carried out during these recalls. During the screening period baseline as well as 2, 4 and 6 months, all subjects underwent physical examinations and biochemical analyses blood chemistry, complete blood count, urinalyses and pregnancy testing. 