Clavulanic AcidAmoxicillin-Potassium Clavulanate CombinationAmoxicillinPotassiumClavulanic AcidsAnti-Bacterial AgentsPotassium Channelsbeta-LactamasesPenicillinsMicrobial Sensitivity Testsbeta-LactamsPenicillanic AcidDouble-Blind MethodPlacebo EffectSulbactamDrug Therapy, CombinationOtitis MediaClarithromycinbeta-Lactam ResistanceAmpicillinTicarcillinDrug Resistance, BacterialMetronidazoleStreptococcus pneumoniaeHaemophilus influenzaePenicillin ResistancePotassium Channel BlockersPotassium Channels, Inwardly RectifyingCefuroximePotassium, DietaryCephalosporinsLactamsAzithromycinPotassium DeficiencyHelicobacter pyloriPotassium Channels, Voltage-GatedPotassium CompoundsOmeprazoleHelicobacter InfectionsTreatment OutcomePiperacillinActinomycetaceaeCefotaxime2-PyridinylmethylsulfinylbenzimidazolesAdministration, OralThienamycinsCommunity-Acquired InfectionsRespiratory Tract InfectionsPotassium IsotopesCephalosporinaseDrug Resistance, MicrobialBacteria, AnaerobicBronchitis, ChronicAnti-Ulcer Agents