Special Populations

A plain-language guide to how pregnancy changes drug safety, what the FDA pregnancy categories mean, and how to work with your provider to weigh risks and benefits.

How drugs pass into breast milk, which factors determine infant exposure, and how to find reliable information to support safe breastfeeding while taking medications.

Why children are not simply small adults when it comes to medications — how age and weight affect dosing, why many drugs lack pediatric data, and how to dose safely.

How aging changes the way the body handles medications, why older adults are more vulnerable to side effects, and practical strategies for safer medication use.

How chronic kidney disease affects drug clearance, which drugs accumulate to dangerous levels in kidney disease, and how renal dosing adjustments protect patients.

How liver disease affects drug metabolism and first-pass elimination, why hepatic dose adjustments are less predictable than renal adjustments, and which drugs require special caution.

How obesity changes drug distribution and metabolism, why standard doses may be inadequate or excessive in people with obesity, and how providers calculate doses for larger body sizes.

What competitive athletes need to know about prohibited substances, anti-doping rules, permitted therapeutic use exemptions, and the medications most commonly implicated in violations.

Why many psychiatric medications cause weight gain, the mechanisms behind it, which medications carry the highest risk, and evidence-based strategies for managing weight while staying on necessary treatment.

Which medication categories impair driving ability, how drug-impaired driving is treated legally, and how to have safe conversations with your doctor about driving while on medication.

A guide to the most important emergency medications — epinephrine, naloxone, aspirin, nitroglycerin, and others — what they do, when to use them, and why some should be in every home.

Practical guidance for caregivers managing medications for another person — organizing complex regimens, preventing errors, recognizing adverse reactions, and communicating effectively with healthcare teams.