by Eric Christianson | Mar 11, 2026 | Gastrointestinal Medication and Disease State Clinical Pearls
Folic acid, or vitamin B9, is an essential nutrient that is needed for cell growth and division, DNA formation, and red blood cell production. Certain medications can interfere with folate absorption and metabolism, which can lead to folate deficiency. Knowing which...
by Eric Christianson | Mar 4, 2026 | Neurology, Pain, and Musculoskeletal Case Studies
Medication reviews in patients with rheumatoid arthritis often uncover clinically significant drug therapy problems. Methotrexate toxicity, drug interactions, and therapeutic duplication are common issues that pharmacists must proactively identify. In this case-based...
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 | Aug 21, 2024 | Infectious Disease and Oncology Case Studies
EJ is a 54-year-old female with a history of rheumatoid arthritis. She has been on methotrexate (with folic acid supplementation) for years with relatively few RA flares over the last 10 years. She was recently diagnosed with a urinary tract infection and was...
by Eric Christianson | Jul 30, 2023 | Drug Interaction Case Studies and Education For Pharmacists
After my recent post on my top 5 medication/vitamin interactions, I received the request to cover medications that deplete vitamins and minerals. I loved this idea because it is an important consideration in clinical practice! Keep in mind that these often show up on...
