Medication Overuse Headache: How Painkillers Cause Daily Headache

Medication overuse headache (MOH) — also called rebound headache, analgesic-overuse headache, or "painkiller headache" — is one of the most common headache disorders seen in neurology clinics, and one of the most misunderstood by patients. The cruel paradox: the very medications taken to relieve headache, when taken too frequently, cause the brain to generate daily headache as a withdrawal phenomenon. The more medication is taken, the more headache occurs — a self-perpetuating cycle that can trap patients in daily pain for years.

Which Medications Cause MOH

Any acute headache medication can cause MOH if overused. Risk thresholds: opioids and combination analgesics (paracetamol + caffeine + codeine — very commonly sold in Indian pharmacies) — 10 days per month; triptans — 10 days per month; simple analgesics (paracetamol, NSAIDs alone) — 15 days per month. The combination analgesics containing caffeine and codeine carry the highest risk and are extremely widely available over the counter in India — a major public health issue.

Recognising MOH

Headache occurring on 15 or more days per month; headache improving with medication but returning regularly; headache typically worse on waking (overnight "withdrawal"); patient reaches for medication immediately on waking; progressive increase in medication use over months to years; headache pattern that has changed from intermittent to daily. Many patients with MOH do not connect their medication use to their headache frequency.

Treatment: Withdrawal Is the Only Cure

Preventive migraine medications (propranolol, topiramate, amitriptyline) will not work while medication overuse continues — they must be combined with withdrawal. Withdrawal approach: abrupt cessation is preferred for most medications (bridges with naproxen or prednisolone can ease the initial worsening); gradual taper for opioids and barbiturates. Withdrawal headache typically peaks in the first 3–5 days then progressively improves over 2–4 weeks. After successful withdrawal, 50–75% of patients have a 50%+ reduction in headache days. Sri Anand CNC, Chanda Nagar, Hyderabad. Call +91 90633 66983.