Comparison of Two Macrolides, Azithromycin and Erythromycin, for Symptomatic Treatment of Gastroparesis

200mg/5ml elixir administered orally three times a day half an hour prior to meals.

The dose of Azithromycin given was determined based on the following study on 10 healthy subjects. In random order, each of ten healthy subjects underwent OBT studies following administration of AZI, at doses of 50mg, 100mg, and 133mg. The T½ and Tlag was then compared for the three doses by a randomized block analysis using Analysis of Variance followed by Tukey's multiple comparison. Results: The T½ for each of the respective doses of AZI (50mg, 100mg, and 133mg) was 129 ± 27, 128 ± 31, and 128 ± 16 minutes (p = 0.98). This data suggested that AZI at doses of 50mg, 100mg and 133 mg have fairly similar activity in its effects on gastric emptying in healthy subjects. Based on this analysis , we decided to use a dose of 50 mg/5 ml for administered TID prior to meals.