Here's a high yield pharmacology point:
Treatment of CMV is either Ganciclovir or Foscarnet
Treamtent of pneumocystis jiroveci is either TMP-SMX or Pentamidine
Never use Ganciclovir with TMP-SMX because they both cause bone marrow suppression, therefore better use Canciclovir with Pentamidine.
Never use Forscarnet with Pentamidine because they both are nephrotoxic, therefore better use Forscarnet with TMP-SMX
Treatment of CMV is either Ganciclovir or Foscarnet
Treamtent of pneumocystis jiroveci is either TMP-SMX or Pentamidine
Never use Ganciclovir with TMP-SMX because they both cause bone marrow suppression, therefore better use Canciclovir with Pentamidine.
Never use Forscarnet with Pentamidine because they both are nephrotoxic, therefore better use Forscarnet with TMP-SMX