About PharmaCompass InPHARMation

I'm Greg Perry, PharmD, BCPS, BCIDP. I've practiced clinical pharmacy for more than 30 years, most of it in the ICU, emergency department, and infectious diseases. 15 years of my 30 plus was as a clinical pharmacy manager.

I'm an Assistant Professor of Pharmacology at Hardin-Simmons University in Abilene, Texas. I teach pharmacology across the physician assistant, nursing, and physical therapy programs; Medical Ethics and the Capstone Research Project course in the PA program; and Writing, Publishing, and Communication, in the Doctor of Medical Science program.

I still practice. At United Regional Health Care System in Wichita Falls I cover the ICU one day per week with daily antimicrobial stewardship reviews, protocol development, and formulary review. I'm a former ASHP Pharmacy Practice Residency Program Director, and at a previous institution I built the antimicrobial stewardship program into a two-time IDSA Antimicrobial Stewardship Center of Excellence.

PharmaCompass Education, LLC is where I put what three decades at the bedside taught me, for the people who prescribe, dispense, and give the drugs.

Pharm Rounds

NCLEX pharmacology for nursing students, written from the pharmacist's side of the Pyxis. 422 cards across 15 systems and unfolding patient cases, built around the questions the exam actually asks: what do I assess before I give it, what's the one lab, what does the patient report, what do I never do. It includes Before You Push, a set of administration-hazard cards no other deck has. I reviewed every card myself. Try six cards free.

InPHARMation

A free, evidence-based pharmacotherapy newsletter published twice monthly, with a dedicated Infectious Diseases edition every month. Each issue turns the latest trials, guideline changes, and pharmacology concepts into something a busy clinician can use on the next shift. Subscribe with the box on the homepage.

PK/PD Modeling, Vancomycin AUC Dosing, CRRT Dosing Application.

Clinical Dosing Software

Three decision-support tools, built and validated, available for institutional evaluation and licensing.

PharmaCompass PK: Vancomycin AUC Dosing. Bayesian-style AUC-guided vancomycin dosing with two-level and single-level estimation. Version 2.0 was validated on a 50-case set against a commercially available FDA-cleared Bayesian vancomycin dosing software: mean prediction error +2.43%, mean absolute prediction error 5.04%, r = 0.96. User guide, technical guide, and validation report available.

CRRT Antimicrobial Dosing Calculator. Effluent-rate-based antimicrobial dosing for patients on continuous renal replacement therapy, with guideline dose floors to prevent beta-lactam underdosing. Version 1.1 scored 29 agree, 1 partial, 0 disagree on a 30-patient validation set against hospital protocols and primary literature. User guide, technical guide, and revision 2 validation report available for pharmacy and IT review.

PK/PD Monte Carlo Modeling. Probability-of-target-attainment simulation for antimicrobial regimen selection against institution-specific MIC distributions.

These run in a browser, require no installation, and are designed for the pharmacist at the bedside, not for a vendor’s implementation team. For a demonstration, validation documents, or licensing for your institution: greg@pharmacompasseducation.com.

Books

I’ve also written two pharmacology textbooks with Springer Nature, Clinical Pharmacology Essentials for PAs and NPs (https://link.springer.com/book/9783032171528) and Pharmacology for Physical Therapy (in final editorial review).

Questions, site licenses for nursing programs, or speaking: greg@pharmacompasseducation.com

PharmaCompass InPHARMation is for educational purposes only and does not constitute medical advice. Always verify clinical information before applying to patient care. Full Disclaimer | © 2026 PharmaCompass Education, LLC