Why Are PFAS Still Used in Drugs When Alternatives Exist?

Joseph Mercola (0:00)

Check the label on any prescription in your medicine cabinet.

If the generic name starts with flu or contains floor, fluoxetine, fluticasone, ciprofloxacin, that medicine contains fluorine. And a new analysis suggests the fluorine may be there for the manufacturer's convenience, not for your health.

SPEAKER_2 (0:21)

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Joseph Mercola (0:38)

Hello, and welcome to Dr. Mercola's Cellular Wisdom.

SPEAKER_3 (0:41)

Most people associate PFAs, PUR and polyfluoroalkyl substances with non-stick pans, waterproof jackets and contaminated tap water, almost nobody associates them with pharmaceuticals. But Dr. Mercola highlights research showing these fluorinated compounds are built into a surprisingly wide range of approved medicines, often for reasons that have more to do with blood circulation than with the therapeutic effect itself.

Joseph Mercola (1:06)

The study, published in Sustainable Chemistry and Pharmacy, asked a direct question. Are PFAS-containing medicines actually necessary, or do practical alternatives already exist?

Researchers reviewed approved active pharmaceutical ingredients and identified 111 PFAS-containing medicines used in humans, plus 28 in veterinary medicine. Then they checked each one against what else is on the market.

SPEAKER_3 (1:31)

And the finding was striking. 87% of those 111 human medicines already have a non-PFAS alternative available right now, and for nearly all of the remainder, alternatives are in development.

Lead researcher Dr. Michael Mueller of the University of Freiburg put it plainly, the fact that PFAS-free alternatives already exist for almost every indication is a clear sign that, pharmacologically speaking, fluorination is not strictly necessary.

Joseph Mercola (1:59)

Why fluorine gets added is worth understanding, because it reframes the whole issue. The analysis found fluorine is rarely responsible for a medicine's therapeutic action. Developers add it because it helps the compound stay stable, resist breakdown, and move through the body differently.

Those are formulation advantages. They make a drug easier to design and manufacture, and they're separate from what the drug is supposed to do for you.

SPEAKER_3 (2:25)

Then there's what happens after the medicine leaves your body. Dr. Mercola points to the finding that 84% of the medicines examined can degrade into trifluoroacetic acid, or TFA, a highly persistent compound that does not break down naturally.

Once excreted, it moves into wastewater systems and eventually into rivers, lakes, and groundwater.

Joseph Mercola (2:45)

And removing TFA from drinking water is extremely difficult, which is why the authors argue for preventing its formation at the source rather than filtering it out downstream. They also mapped where these medicines show up therapeutically, and they're spread across nearly every category of health care.

This isn't one disease's problem. It requires evaluating each medicine individually.

SPEAKER_3 (3:05)

The reason this matters personally is accumulation. These are called forever chemicals because they break down extremely slowly, so they build up in water, soil, food, and eventually in your tissue. The article notes research linking higher PFAS exposure to reduced immune response, liver damage, thyroid disorders, and reproductive and developmental problems.

Separate research has associated PFAS-contaminated drinking water with higher rates of abnormal cell growth.

Joseph Mercola (3:32)

Dr. Mercola frames it the way you'd think about secondhand smoke.

One exposure isn't the story. The total accumulated over years is what matters. And that framing is good news because it means you don't need one dramatic intervention. You need several practical reductions that compound over time.

SPEAKER_3 (3:49)

The first practical step is only taking prescription medicines you genuinely need.

Many people stay on drugs long after the original reason has disappeared. Bring a complete list of every medication to your next appointment and ask your doctor to walk through each one. Is it still necessary? Or has your situation changed enough to reassess?

Joseph Mercola (4:08)

The second step is asking about PFAS-free equivalents.

A useful script from the article, I'm trying to reduce my exposure to persistent fluorinated chemicals. Does this medication contain fluorine? And if so, is there an equally effective alternative that doesn't? Most doctors haven't fielded that question before, so framing it as a preference rather than a demand keeps the conversation productive.

SPEAKER_3 (4:31)

One critical caveat Dr. Mercola is explicit about, nobody should stop a prescribed medication on their own based on this research. The point is informed consent, not abandonment. This matters most when you're starting something new or reviewing a long-term prescription at an annual visit.

Joseph Mercola (4:48)

Beyond medicine, the everyday sources add up faster. Replace nonstick cookware with stainless steel. Limit food and grease-resistant wrappers. Skip stain-resistant carpet and furniture treatments. Choose personal care products without fluorinated ingredients.

Lowering exposure across several areas has a far greater effect than obsessing over one.