Diagnosing Medication Overuse Headache
The patient presents with chronic daily headaches despite a history of migraine. A key factor is the recent, frequent use of Sumatriptan (almost daily for three weeks) without significant relief.
Key Indicators for Diagnosis
- Chronic Daily Headache: The headache occurs daily.
- History of Primary Headache Disorder: The patient has a known history of migraine.
- Medication Overuse: Frequent use of acute headache medication (Sumatriptan daily for 3 weeks) is documented. This frequency exceeds typical recommendations (e.g., generally >10-15 days/month for triptans/opioids/combination analgesics, or >15 days/month for simple analgesics).
- Worsening Pattern: Headaches are increasingly unrelieved by standard analgesics, suggesting a change in headache pattern potentially due to medication overuse.
Analysis of Options
- Sub-arachnoid hemorrhage: Typically presents as a sudden, severe ("thunderclap") headache, unlike the chronic pattern described.
- Cluster headache: Characterized by severe, unilateral pain with autonomic features, occurring in bouts, which differs from the patient's daily headache presentation.
- Medication Overuse Headache (MOH): This diagnosis aligns perfectly with the patient's presentation of chronic daily headache in the context of frequent acute medication use, superimposed on a pre-existing migraine disorder.
- Trigeminal neuralgia: Involves sharp, shooting facial pain triggered by specific stimuli, not continuous daily headaches.
Therefore, the patient's presentation is most consistent with Medication Overuse Headache.
Important Questions from Drug Overdose
Consider the following statements regarding paracetamol toxicity :
1. Toxicity is caused by an intermediate reactive metabolite that binds covalently to cellular proteins causing cell death.
2. Antidotes for paracetamol act by replenishing hepatic glutathione and should be administered to all patients with acute poisoning.
3. Intravenous acetyl cysteine is a highly efficacious antidote if administered within 8 hours of the overdose.
4. Methionine may be used as an alternative antidote but it is less effective than acetyl cysteine.
Which of the statements given above are correct?
- Which one of the following is a specific antidote for opiate overdose ?
- Which one of the following is the most appropriate treatment of overdose of aspirin ingestion ?
