Final answer:
A patient with CHF and pitting edema experiencing pulmonary edema is likely taking a loop diuretic to reduce fluid buildup in the body.
Step-by-step explanation:
A patient with CHF (congestive heart failure) and 3+ pitting edema experiencing pulmonary edema would most likely be taking a type of medication known as a Diuretics help to reduce the amount of fluid in the body by increasing urine production, which helps alleviate the fluid congestion in the lungs and other parts of the body. In the case of heart failure leading to pulmonary edema, the diuretic is often one that acts on the in the kidney, inhibiting the reabsorption of sodium (Na+) and chloride (Cl-), which leads to increased fluid elimination and a reduction of edema.