The research reveals that it's not just antibiotics that have the effect of causing resistance to antibiotics. "Of the drugs in the study, 156 were antibacterials (144 antibiotics and 12 antiseptics). But a further 835, such as painkillers and blood-pressure pills, were not intended to harm bacteria. Yet almost a quarter (203) did...

From Slashdot:

The research reveals that it's not just antibiotics that have the effect of causing resistance to antibiotics. "Of the drugs in the study, 156 were antibacterials (144 antibiotics and 12 antiseptics). But a further 835, such as painkillers and blood-pressure pills, were not intended to harm bacteria. Yet almost a quarter (203) did...

"However, Dr Maier's study also brings some good news for the fight against antimicrobial resistance. Some strains she looked at which were resistant to antibiotics nevertheless succumbed to one or more of the non-antibiotic drugs thrown at them. This could be a starting point for the development of new antimicrobial agents which would eliminate bacteria that have proved intractable to other means."

Further reading:

• Extensive impact of non-antibiotic drugs on human gut bacteria
• Non-antibiotic drugs promote antibiotic resistance