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Table 1 Sequences of study treatments

From: Tolerability and efficacy of a combination of paracetamol and caffeine in the treatment of tension-type headache: a randomised, double-blind, double-dummy, cross-over study versus placebo and naproxen sodium

1. PCF–NAP–PLA

2. NAP–PLA–PCF

3. PLA–PCF–NAP

4. PCF–PLA–NAP

5. NAP–PCF–PLA

6. PLA–NAP–PCF

  1. PCF paracetamol 1,000 mg + caffeine 130 mg, NAP naproxen sodium 550 mg, PLA placebo
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The Journal of Headache and Pain

ISSN: 1129-2377

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