by Eric Christianson | Aug 27, 2025 | Renal, Urology, and Electrolytes Case Studies
In this hyperkalemia case study, I outline the importance of paying attention when medications are discontinued. EN is a 78-year-old female with chronic kidney disease stage 4, hypertension, heart failure with preserved ejection fraction, and type 2 diabetes. She had...
by Eric Christianson | Jun 11, 2025 | Drug Interaction Case Studies and Education For Pharmacists
Trimethoprim-sulfamethoxazole (Bactrim) is a commonly prescribed antibiotic for urinary tract and other infections. However, it’s also associated with several clinically significant drug interactions that can lead to serious patient harm if overlooked. Here are my top...
by Eric Christianson | May 15, 2024 | Infectious Disease and Oncology Medication and Disease State Clinical Pearls
Antibiotics are an essential tool to treat infections. I’ve seen a lot of drug interactions involving antibiotics that have led to anything from treatment failure to drug toxicity. In this blog post, I share my top 5 antibiotic drug interactions you are likely...
by Eric Christianson | Jul 16, 2023 | Renal, Urology, and Electrolytes Medication and Disease State Clinical Pearls
Sodium polystyrene sulfonate (SPS, Kayexalate) has been used for decades to help lower potassium levels and manage hyperkalemia. It does this by exchanging sodium ions for potassium ions in the gut (primarily the large intestine). The compound is then removed from the...
by Eric Christianson | Apr 23, 2023 | Cardiovascular Case Studies, Infectious Disease and Oncology Case Studies
One thing I always encourage is critical thinking. Reviewing a diagnosis list will give you clues as to the likely medications that a patient is taking or should be taking if they are following guideline-based medication therapy. In this Bactrim CHF case study, I...
