title: In vitro studies on drug--antibiotic interactions I: analgesics, antipyretics, antimalarials, and tranquilizers.
abstract: The antimicrobial effects of some analgesics, antipyretics, antimalarials, and tranquilizers were determined. The phenothiazines were the most active group. The effect of the chosen drugs when combined with a selected number of antibiotics was studied on Staphylococcus aureus and Escherichia coli to determine the type of interaction. Most analgesics, antipyretics, and antimalarials showed either no effect or a synergistic action. However, some exhibited antagonistic effects. All tested tranquilizers were synergistic. Preliminary studies, using electronic absorption spectrometry, indicated that the antagonistic action may be attributed to a physical interaction.
mesh_terms: D000700:Analgesics / Q000494:pharmacology*; D000900:Anti-Bacterial Agents / Q000494:pharmacology*; D000894:Anti-Inflammatory Agents, Non-Steroidal / Q000494:pharmacology*; D000962:Antimalarials / Q000494:pharmacology*; D001419:Bacteria / Q000187:drug effects; D002176:Candida albicans / Q000187:drug effects; D004347:Drug Interactions; D013053:Spectrophotometry; D014149:Tranquilizing Agents / Q000494:pharmacology*
chemical_list: D000700:Analgesics; D000900:Anti-Bacterial Agents; D000894:Anti-Inflammatory Agents, Non-Steroidal; D000962:Antimalarials; D014149:Tranquilizing Agents