Final answer:
A metallic taste in the mouth and dark brown urine in a patient can be side effects of the antibiotic metronidazole, commonly prescribed for bacterial infections.
Step-by-step explanation:
A patient presenting with a metallic taste in her mouth and dark brown urine may be experiencing side effects from an antibiotic they are taking. Given this information, it is possible that the antibiotic in question is metronidazole, which is known to cause a metallic taste in the mouth as a side effect. Moreover, certain antibiotics, including metronidazole and others, can lead to darkening of the urine. It is essential for clinicians to be aware of these potential side effects and to educate patients accordingly when prescribing these medications.