All patients gave written informed consent
before enrolling in the trial. Patients were randomly
allocated to receive two 325 mg capsules of ginger or
two 12.5 mg identical-looking capsules of vitamin B6
three times daily before meals for 4 days. Both groups
did not take any other medication outside the trial. Patients
were requested to take two randomized capsules
immediately to confirm their ability to swallow the capsules.
Patients were advised to divide their meals into
frequent smaller meals with high carbohydrate and low
fat. Patients were requested to record their symptoms
at first enrollment 24 hours before treatment for the
baseline score, then at noon of each subsequent day
of treatment. Patients were requested to return the day
after completing their medication to assess their responses
to treatment. Those who did not return would
be contacted by telephone.