Women More Likely to Experience Adverse Drug Reactions
Why Yoru Sex Matters to Your Medications
Table of Contents
Published August 19, 2025
The Gendered Reality of Medicine
For decades, medical research and practise have largely operated under the assumption of a “one-size-fits-all” approach. However, a growing body of evidence reveals a critical truth: sex and gender considerably impact how we respond to medications. Women, in particular, are almost twice as likely as men to experience adverse drug reactions. This isn’t about chance; it’s about basic biological and physiological differences that demand a more personalized approach to healthcare.
Beyond Biology: The Role of Gender
While biological sex – encompassing genetic, hormonal, and physiological distinctions – plays a notable role, gender, encompassing socially constructed roles and behaviors, also exerts a powerful influence. Lifestyle factors, self-medication practices, and adherence to treatment plans can vary between genders, further impacting drug response. These factors, combined with biological differences, create a complex interplay that must be considered.
Specific Risks and Disparities
The impact of these differences isn’t uniform across all medications. Certain therapeutic areas, such as those addressing cardiovascular and nervous system conditions – including psychotropic drugs – show especially pronounced disparities. For example, women are more susceptible to dependency, drowsiness, and falls when taking benzodiazepines.Statins, commonly prescribed for cholesterol management, are associated with a higher risk of myalgia (muscle pain), new-onset diabetes, and liver damage in women. Similarly, antipsychotic medications can lead to greater weight gain and hormonal alterations in female patients.
The “Bikini Medicine” Problem
Historically,medical research has been criticized for what experts call “bikini medicine”-a limited view of women’s health that focuses solely on reproductive organs. This narrow perspective has led to the exclusion of women from clinical trials,justified by concerns about fetal risks during pregnancy. As Dr. María Isabel Lucena González and Dr. Encarnación Blanco Reina, specialists in Clinical Pharmacology at the University of Malaga, point out, this exclusion has created significant knowledge gaps and perpetuated inequalities in healthcare. The assumption that men and women respond to drugs identically, simply because of shared physiology beyond reproductive health, is demonstrably false.
pharmacokinetic and Pharmacodynamic Differences
The differences in drug response stem from variations at both the pharmacokinetic (how the body processes the drug) and pharmacodynamic (how the drug affects the body) levels.Women generally exhibit greater systemic exposure to medications at equivalent doses,meaning a higher concentration of the drug reaches their bloodstream. This can be attributed to factors like differences in body composition, metabolism, and hormone levels.
A Call for Change: The role of Clinical Pharmacology
The Spanish Society of Clinical Pharmacology (SEFC) is at the forefront of advocating for change. They are urging for the elimination of research gaps, a more nuanced analysis of clinical trial data, and increased awareness among healthcare professionals regarding sex- and gender-specific differences. The work of clinical pharmacologists is vital in evaluating the benefit-risk balance of medications for all patients, tailoring prescriptions to individual needs, and promoting the responsible use of drugs.
Inspiring the Next Generation
The importance of this issue is being recognized by the next generation of medical professionals. Students Leonor Amador and Marina Gamero from the University of Malaga won an award from the International Union of Basic and Clinical Pharmacology (Iuphar) for their poster,Blowing Up Pharmoncology
,which humorously illustrates the pharmacokinetic differences between sexes. Another team from the same university received recognition for their research on sex Differences in Drug-Induced Liver Injury: Same Pills, Different Thrills
.