A 52-year-old woman with a long history or recurrent urinary tract infections now has another one. Review of culture results reveal that the organism is resistant to sulfa drugs. What is the most likely mechanism of resistance to this medication?

A 52-year-old woman with a long history or recurrent urinary tract infections now has another one. Review of culture results reveal that the organism is resistant to sulfa drugs. What is the most likely mechanism of resistance to this medication?

A 64-year-old woman is hospitalized for COPD exacerbation. While in the hospital, she becomes constipated. She also takes metoprolol for hypertension and mirtazapine for depression. The physician gives her docusate. Which of the following adverse reactions is most likely to occur as a result of docusate administration in this patient?

A 19-year-old man cuts his hand while slicing a bagel. He sustains a 4-cm laceration of the palmar aspect of his hand. The wound will be sutured with absorbable sutures. Prior to beginning the procedure, the wound is injected with lidocaine containing 1:100,000 parts epinephrine. The rationale behind the use of epinephrine is which of the following?

A 58-year-old man with a long history of depression is evaluated for treatment by his primary care physician. The physician begins treatment with sertraline. The patient is concerned about the possibility of sexual dysfunction. Which of the following changes is possible?

A 74-year-old man with bladder cancer and refractory depression is tried on a new agent to help his depression. Tranylcypromine is begun by his primary care physician. Which of the following adverse reactions may be expected in this patient?