Medication Literacy
The everyday drugs most people underestimate
Over-the-counter painkillers feel harmless because they're sold without a prescription. They aren't risk-free — and the most common harms come from exceeding the dose or taking them for longer than intended, not from rare side effects.
NSAIDs (Ibuprofen, Naproxen, Aspirin): Useful, Easy to Overuse
NSAIDs (non-steroidal anti-inflammatory drugs) work by blocking inflammation — which is also how they cause harm with regular use.
- Gut damage is the most common issue: regular NSAID use irritates the stomach lining and can cause ulcers or bleeding, especially when taken with alcohol or on an empty stomach.
- Kidney strain builds with frequent use, particularly if you're dehydrated, older, or already have reduced kidney function.
- Cardiovascular risk rises modestly with regular use, particularly at higher doses — relevant if you already have heart disease risk factors.
- The practical rule: use the lowest effective dose, for the shortest time needed, with food. Daily use for more than a few days for a recurring issue (frequent headaches, ongoing back pain) is a signal to see a doctor about the underlying cause, not to keep dosing around it.
Paracetamol (Acetaminophen): Narrow Margin for Liver Safety
Paracetamol is gentler on the stomach than NSAIDs, but it has a notably narrow gap between an effective dose and a liver-damaging one.
- The maximum is usually 4g per day for adults (check your local packaging — it varies by country) — and that's a ceiling, not a target to hit regularly.
- It hides in combination products — cold and flu remedies, prescription painkillers, and sleep aids often already contain paracetamol. Taking a standalone dose on top of one of these is a common, accidental way to exceed the limit.
- Alcohol increases liver risk at any paracetamol dose — the combination is more dangerous than either alone.
- Overdose can cause serious, sometimes fatal liver damage, and symptoms can be delayed by a day or more — if you suspect you've taken too much, seek medical help immediately rather than waiting to see how you feel.
The simple habit that prevents most problems
Check the active ingredient and dose on everything you take in a day — including combination cold remedies — before assuming it's safe to add another painkiller on top. Most medication harm comes from stacking, not from a single dose.
Key Takeaway
Most NSAID and paracetamol harm comes from stacking doses across products, not from a single dose. Check what's already in what you're taking.
Connections
Supplements & Electrolytes
Both chapters are about knowing exactly what you're taking, at what dose, and why — stacking is the common failure mode in each.
When to See a Doctor
Recurring pain that keeps you reaching for painkillers is itself a symptom worth getting checked, not just medicating.
Heart & Metabolic Health
Regular NSAID use carries modest cardiovascular risk — relevant if you already have heart disease risk factors.