The purpose of this study is to evaluate the efficacy and safety of Canadá association in the treatment of chronic pain
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
DOUBLE
Canadá association 1 tablet twice a day
Placebo of Canadá association 1 tablet twice a day
Dipyrone 1 tablet twice a day
Difference in pain intensity assessed by the VAS scale
Change from baseline in the pain intensity escores assessed in medical visits.
Time frame: 12 weeks
Adverse events
Incidence and severity of adverse events recorded during the study
Time frame: 16 weeks
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Placebo of dipyrone 1 tablet twice a day
Tramadol 1 coated tablet twice a day
Placebo of tramadol 1 coated tablet twice a day