Why Do Some Antibiotics Harm the Liver More Than Others? IIT Bombay Study Explains

Add as a preferred source on Google

When you think of antibiotics, you probably picture them as life-saving pills that wipe out infections fast. And that's true, they've transformed modern medicine. But doctors have also noticed something puzzling: some antibiotics seem much harder on the liver than others, even when they're chemically similar and used for the same infections.

A new study from IIT Bombay, in collaboration with scientists from Sunway University in Malaysia, offers an explanation, and it might change how future medicines are tested and designed.

Photo Credit: Freepik

Liver Damage Isn't Just About How Strong a Drug Is

Traditionally, researchers thought the main reason a drug might hurt the liver was how much it interferes with cell membranes, essentially "breaking" them. But this new study shows the problem is more subtle.

The key isn't just how much disruption happens, but where and how long the antibiotic interacts with the liver cell's outer layer, the cell membrane.

Two Similar Antibiotics, Two Very Different Outcomes

To study this, researchers examined two powerful antibiotics called Teicoplanin and Oritavancin, both used to treat serious bacterial infections like pneumonia. Clinicians know from experience that Teicoplanin is linked with more liver issues in patients, while Oritavancin tends to be better tolerated, even though they're chemically alike and fight bacteria in similar ways.

Here's what the study found:

• Oritavancin tends to sink deep into the fatty interior of the liver cell membrane. Once there, it stays put and doesn't interfere much with how the membrane normally works.
• Teicoplanin, by contrast, tends to linger near the outer surface of the membrane. There, it sticks and interacts with the membrane longer, subtly altering the electrical charges and the way the membrane's outer layer is packed and moves.
• This persistent surface interaction, even if it doesn't seem dramatic, turns out to be more harmful over time than a deeper penetration that doesn't disrupt those critical surface processes.

From Lab Models to Real-Life Effects

To test how this difference plays out in actual biology, the team gave rats either Teicoplanin or Oritavancin.

Rats given Teicoplanin showed elevated liver enzymes, inflammation, and signs of liver cell damage.

Rats given Oritavancin, on the other hand, had milder changes, their enzyme levels rose slightly, but tissue damage was minimal.

This supports the idea that where a drug sits on a cell membrane matters more than how much it physically disrupts it.

Why This Matters for Medicine and Safety

Photo Credit: Freepik

Drug-induced liver injury is one of the biggest reasons medications get pulled from the market or restricted after approval. But it's often hard to predict which drugs will cause problems during development, sometimes liver issues only show up in clinical settings, after humans start taking the medicine.

What this study shows is a new lens for early safety checks: instead of only measuring chemical potency or cell damage in big doses, scientists could look at how antibiotics, and potentially other drugs, interact with the surface of liver cells at the membrane level. That might help identify risky candidates much earlier.

In other words, this membrane-focused approach could become a new tool in the drug maker's toolkit, helping design safer medicines and reduce harmful side effects before a drug ever reaches patients.

What This Means for You

If you're prescribed antibiotics, your liver will break them down as part of your body's normal detox process. Most people tolerate them fine. But this research helps explain why some antibiotics tend to cause liver enzyme elevations more often than others, and why scientists are now paying closer attention to how medicines interact with cells at their very boundaries.

In a world where medication safety is as important as efficacy, these microscopic insights are big steps forward.

Disclaimer: The information provided in this article is for general informational and educational purposes only and is not intended as a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or a qualified healthcare provider with any questions you may have regarding a medical condition.