Painkiller Headache: Why More Tablets Make It Worse

If you take a painkiller for headache on more than 2 or 3 days a week, month after month, the tablets have probably become the cause of the headache. This is medication-overuse headache, and it’s one of the commonest reasons for a daily sar dard in Pakistan and India, where painkillers sit on every shop counter. The way out is not another brand. It’s a planned withdrawal with a pharmacist or doctor, a diary, and a few weeks of patience. Here’s how to recognise it and what the process looks like.

How can a painkiller cause a headache?

Your brain has a pain thermostat. A painkiller turns it down for a few hours. Take one now and then and the thermostat resets when the tablet wears off. Take one most days and the brain adapts: it turns the thermostat up to compensate, so ordinary sensations start to register as pain. Now the tablet wearing off is itself a trigger. You wake with the ache because the last tablet was hours ago, you take another, it eases, it returns. Every tablet buys a few hours and adds to the debt. After three months the original headache (usually migraine or tension-type) has been joined by a daily one, and the two can’t be separated until the tablets stop.

It happens with every kind of shop painkiller. Simple ones need more days to cause it; combination, caffeine-containing, codeine-type and migraine-specific ones need fewer. That’s why the rule has two numbers.

The 10-to-15-days-a-month rule, explained

Doctors count days, not tablets. A day on which you took any painkiller for headache is a “medication day”, whether you took one tablet or three. The line is drawn like this:

• Simple painkillers alone: 15 or more medication days a month, for more than 3 months.
• Combination tablets (painkiller plus caffeine, or plus another painkiller), codeine-type products, or migraine-specific tablets: 10 or more medication days a month, for more than 3 months.
• Headache days: 15 or more a month is the other half of the definition. Daily or near-daily headache plus regular painkillers is the pattern.

Two or three days a week is roughly 10 to 13 days a month, which is why we say “more than 2 or 3 days a week”. Notice this says nothing about how much you take on those days. Frequency is the whole story.

Why caffeine tablets and “sar dard ki goli” are the worst offenders

The combination products sold loose at the corner shop are usually a painkiller mixed with caffeine, sometimes two painkillers together. Caffeine makes the painkiller feel like it works faster, and it does help a little. But caffeine has its own withdrawal headache, arriving within a day of your last dose. So a caffeine-painkiller tablet gives you two rebounds for the price of one: the painkiller thermostat and the caffeine crash. Add three or four cups of chai and a cola and the brain never sees a caffeine-free hour. If this is you, don’t feel foolish. The product was designed to be taken again.

The other trap is the strip bought without a name. Read it, or take it to a pharmacist. You can’t plan a withdrawal from a medicine you can’t name.

How do I check whether this is me?

1. Get a calendar. Paper, or the notes app. One month is enough for a first look; three is better.
2. Mark every headache day with an H and a strength score from 0 to 10.
3. Mark every medication day with an M, and write what you took (name from the strip), how many, and roughly what time.
4. Add chai, coffee and cola as a number of cups or bottles per day. Caffeine counts here.
5. At the end of the month, count. 15 or more H days plus 10 or more M days (combination or caffeine tablets) or 15 or more M days (simple painkillers) is the pattern. If you’ve had it for 3 months, it’s very likely medication-overuse headache.
6. Check the shape. Is the headache there on waking? Does it ease 30 to 60 minutes after a tablet and creep back 4 to 6 hours later? Does missing the tablet make it worse by afternoon? Three yeses confirm it.
7. Take the calendar to a pharmacist or doctor. Don’t stop anything on your own yet.

What does withdrawal actually involve?

The overused painkiller has to stop. There’s no way round that, and the headache doesn’t improve while it continues. What a doctor adds is the plan that makes stopping survivable. The usual shape: the offending tablet stops (for most shop painkillers, abruptly; for codeine-type products, sometimes stepped down), the doctor may prescribe something short-term to soften the first days, and often starts a preventive medicine at the same time if the underlying headache was migraine. Expect the headache to get worse for 2 to 10 days, sometimes with nausea, poor sleep and restlessness. Then it lifts. Most people are clearly better by 2 months, and their original headache becomes visible and treatable again.

During those weeks the home measures matter more than usual: regular meals, 2 litres of water a day, fixed sleep and wake times, heat on the neck, a dark room for a bad hour, and a walk in daylight. Step caffeine down gently over the same period, one fewer cup every 3 or 4 days, unless the doctor says otherwise; our coffee vs chai caffeine maths post shows what’s in each cup. Tell your family what’s happening so the bad week isn’t read as moodiness.

What not to do: swap brands (same problem, new box), double up “to get through the week”, or take them “only when it’s really bad” without counting days. The counting is the treatment.

Myth: painkillers are harmless if you buy them without a prescription

Being available without a prescription means the medicine is safe at pack amounts for occasional use. It doesn’t mean daily use is safe. Besides the rebound, daily shop painkillers are the leading cause of the stomach burning we cover in painkiller-induced gastritis, years of use load the kidneys, and some nudge blood pressure up. None of this argues against one when you need it. It argues for counting the days.

After withdrawal: keeping it from coming back

The rule going forward is simple: painkillers for headache on no more than 2 days a week, and never on 3 days in a row. Keep the calendar going, because relapse is common in the first year and it’s easy to drift back to daily use during a stressful month. Treat the original headache properly: if it was migraine, that means a preventive if attacks are frequent, and the triggers work in our headache home remedies guide; if it was tension-type, that means the neck, the screen and the sleep. And keep caffeine steady: the same modest amount at the same times, every day, including weekends and fasting months. More honest self-care sits in the Desi Remedies series.

Painkiller headache: what people ask