Nexium and amoxicillin. Adverse events that occurred have been limited to those that had been observed with either NEXIUM, amoxicillin, or clarithromycin alone. 25 Susceptible (S) 0. . Patients not eradicated of H. The usual dose for the triple therapy is: Nexium 40 mg once a day for 10 days; amoxicillin 1,000 mg twice a day for 10 days; and clarithromycin 500 mg twice a day for 10 . 0 Resistant (R) Amoxicillin MIC (µg/ mL) a, b InterpretationThe FDA also approved Nexium for maintenance of he... more