I have a different take. Get a job at a hospital as a tech and spend a lot of time mixing and preparing IVs in the compounding room. Then learn all the antibiotics...know the vials...learn the names...learn what its mixed in....how fast to infuse..learn what the vials look like...then by the time you get to pharmacology and therapeutics you will be a lot more familiar with them. Then you can really delve into therapeutics of it. Also spend some time with the purchaser and go ahead and do the purchasing some....you will get a sense of how much they cost. And always ask the pharmacists what its being used for....what you're treating.
Get a copy of the hospital antibiogram. Learn what antibiotics are effective against what bugs. Ask the pharmacist to show you culture and sensitivity reports to see if patient is on correct antibiotics.
Kind of like a seagull; I used to swoop in, make a lot of noise and **** everywhere, then leave. They were usually pretty excited to see me go. Now I only leave to walk back to my office. I'm always sure to stop by and say hi to all of the pretty nurses and flash my new employee badge at them. Usually makes for fun small talk in the elevators.