Pharma is dosing drugs wrong – the quantum tunneling correction nobody is using
Current pharmaceutical models rely on classical physics, ignoring quantum tunneling in drug metabolism. This oversight leads to faster drug breakdown and significant undertreatment for patients.
One line of math is missing from every dosing formula
Every pharmaceutical dosing model calculates how fast enzymes break down drugs using classical transition state theory — the Eyring or Arrhenius equation. This framework assumes protons and hydrides move over energy barriers.
They don't. They tunnel through them.
When quantum tunneling occurs, the real reaction rate is faster than the classical prediction. The drug disappears from the patient's blood faster than the model says. The dose runs out early. The patient is undertreated.
The correction is one multiplication. That's it. Multiply the classical rate by κ. The tunneling coefficients have been published for decades. Nobody uses them.
The most important drug enzyme on the planet
κ: Zhang, Lin (2009) J.Phys.Chem.A 113:11501
The enzyme that breaks down serotonin
κ: Klinman (1994) Biochemistry 33:14871
The enzyme that decides if you survive methanol poisoning
κ: Cha, Murray, Klinman (1989) Science 243:1325
Medications you or someone you know is taking right now
| Drug | What it treats | Enzyme | Error | |---|---|---|---| | Atorvastatin (Lipitor) | High cholesterol | CYP3A4 | −75% | | Cyclosporine | Organ transplant rejection | CYP3A4 | −75% | | Midazolam | Sedation, anxiety | CYP3A4 | −75% | | Codeine | Pain | CYP3A4 | −75% | | Tranylcypromine | Depression | MAO-A | −75% | | Phenelzine | Depression, anxiety | MAO-A | −75% | | Selegiline | Parkinson's | MAO-A | −75% | | Fomepizole | Methanol/ethylene glycol poisoning | ADH | −65% |
This is not a complete list. CYP3A4 alone processes approximately 50% of all oral pharmaceuticals — hundreds of drugs.
This has been known for 37 years
1980: Bell publishes the tunneling correction theory.
1989: Klinman proves quantum tunneling in ADH. Published in Science.
1999: Kohen and Klinman confirm it across multiple enzymes. Published in Nature.
2005: Krauser and Guengerich measure KIE = 15 for CYP3A4.
2009: Zhang and Lin publish κ = 3× for CYP3A4.
2020: Oanca, Stare, Mavri measure KIE = 8.5 for MAO-A.
2026: Still no clinical dosing model includes κ.
The numbers
Peer-reviewed sources
- Cha, Murray, Klinman — Science 243:1325-1330 (1989)
- Kohen, Cannio, Bartolucci, Klinman — Nature 399:496-499 (1999)
- Oanca, Stare, Mavri — PMID:32191250 (2020)
- Klinman — Biochemistry 33:14871 (1994)
- Zhang, Lin — J.Phys.Chem.A 113:11501-11508 (2009)
- Krauser, Guengerich — J.Biol.Chem. 280:19496 (2005)
- Rydberg, Ryde, Olsen — J.Med.Chem. 49:6400 (2006)
Source: Hacker News
