Yes, chemistry is required for nearly every nursing program in the United States. The type and depth of chemistry coursework depends on which nursing path you pursue. A four-year Bachelor of Science in Nursing (BSN) program typically requires two or three chemistry courses, while practical nursing (LPN/LVN) and associate degree programs usually require one introductory chemistry course.
What Chemistry Courses Nursing Programs Require
BSN programs vary in how much chemistry they expect, but most require coursework covering three areas: general (inorganic) chemistry, organic chemistry, and biochemistry. Some schools package all three into a single combined course, often called “GOB chemistry” (general, organic, and biochemistry). Others split them across two or three separate courses with labs.
At UCLA’s nursing school, for example, BSN students take three chemistry courses covering atomic and molecular structure, thermodynamics, electrochemistry, kinetics, and organic chemistry. Seattle University requires just one introductory chemistry course, while Washington State University requires courses spanning inorganic, organic, and biochemistry, all with labs. Pacific Lutheran University offers a single course called “Chemistry of Life” that covers organic chemistry and biochemistry together. The range is wide, so checking your target school’s specific prerequisites early is worth your time.
Associate Degree in Nursing (ADN) programs generally require less chemistry than BSN programs, but they still require it. Practical nursing programs preparing you for LPN or LVN licensure also include chemistry. Edmonds College’s practical nursing program, for instance, lists an introductory chemistry course with lab as one of seven prerequisites.
High School Chemistry Matters Too
If you’re still in high school, plan to take at least one year of chemistry before applying. Lewis University’s BSN admissions page states that applicants are “strongly advised to have completed one year of high school chemistry” with a grade of C or above. While not every program frames it as a hard requirement, a high school chemistry background prepares you for the college-level courses you’ll face and strengthens your application. Skipping it means you’ll likely need to take a remedial or introductory course in college before moving into the required prerequisite, adding time and cost to your degree.
Why Nurses Actually Use Chemistry
Chemistry prerequisites aren’t just academic gatekeeping. Several core nursing responsibilities rely on chemical principles you’ll use regularly on the job.
Fluid and Electrolyte Balance
Your body maintains a tightly controlled acid-base balance, measured as pH. Electrolytes like bicarbonate help regulate that balance, and when it shifts even slightly, patients can become critically ill. Nurses monitor fluid intake and output, interpret lab results showing electrolyte levels, and recognize when something like a potassium or sodium imbalance is becoming dangerous. Understanding what pH means, how buffers work, and why certain electrolytes matter gives you the foundation to catch problems before they escalate.
Medication Safety and Drug Interactions
Pharmacology is one of the most chemistry-heavy parts of nursing education. Most drugs are chemically altered in the liver to make them easier for the body to excrete. When a patient takes multiple medications, one drug can affect how another is metabolized, absorbed, or eliminated. Some drugs bind to the same proteins in the blood, and when one displaces the other, the unbound drug becomes more active in the body, sometimes dangerously so. Other drugs can form chemical complexes with each other in the gut, preventing proper absorption and making treatment ineffective. Changes in urinary pH caused by one medication can speed up or slow down how quickly another drug leaves the body. Nurses need to understand these interactions well enough to question orders that could harm a patient.
Interpreting Lab Results
Arterial blood gas (ABG) tests are one of the most commonly ordered assessments in hospital settings. They measure the pH of the blood along with oxygen and carbon dioxide levels drawn from an artery. Nurses interpret these results to assess whether a patient is in respiratory or metabolic acidosis or alkalosis, conditions that require different interventions. A basic metabolic panel includes values for sodium, potassium, chloride, glucose, and bicarbonate. Reading these numbers and understanding what they mean in context is a daily skill for bedside nurses, and it’s built on chemistry fundamentals like acid-base reactions and concentration.
How to Prepare if Chemistry Feels Intimidating
Many nursing students don’t consider themselves “chemistry people,” and that’s fine. Nursing chemistry courses are typically designed for health science students, not future chemists. They focus on biological applications rather than abstract theory. You’ll learn about molecular behavior in the context of the human body, not in the context of industrial reactions or advanced physics.
If you struggled with chemistry in high school or never took it, consider starting with an introductory or preparatory chemistry course at a community college before tackling the prerequisite your nursing program requires. Many community colleges offer “chemistry for health sciences” courses specifically designed for students entering nursing, dental hygiene, or other allied health fields. These courses move at a manageable pace and connect every concept back to the body, which makes the material feel more relevant and easier to retain. The grade you earn in chemistry prerequisites also factors into your application, so giving yourself the best shot at a strong grade is a practical strategy, not a weakness.