Treatment of Cannabis-Induced Headache/Migraine

First-Line Treatment Approach

The American College of Physicians recommends starting with NSAIDs for mild to moderate cannabis-induced headache, using the same agents proven effective for primary migraine 1, 2
Specific dosing recommendations include aspirin 650-1000 mg, ibuprofen 400-800 mg, or naproxen sodium 275-550 mg 2, 3
Combination therapy with aspirin plus acetaminophen plus caffeine shows enhanced efficacy compared to single agents 1, 3
Ketorolac 30-60 mg IM/IV provides rapid onset for severe presentations requiring parenteral therapy 2

If NSAIDs fail within 2 hours, escalate to triptans (naratriptan, rizatriptan, sumatriptan, or zolmitriptan) for moderate-to-severe headache 1, 2, 3
Subcutaneous sumatriptan is most effective when rapid peak intensity occurs or oral medications are ineffective 3
Triptans work best when administered early while headache remains mild 3
Intranasal dihydroergotamine (DHE) serves as an alternative migraine-specific agent with good efficacy and safety profile 2

Add antiemetics (metoclopramide 10 mg IV or prochlorperazine 10 mg IV) for nausea, which also provide synergistic analgesia 2, 4
Select non-oral routes of administration when significant nausea or vomiting is present 1, 2
Prochlorperazine can be given orally at 25 mg (maximum 3 doses per 24 hours) combined with diphenhydramine to prevent extrapyramidal side effects 4

Discontinue cannabis use immediately, as continued use perpetuates the headache cycle similar to other medication-overuse headaches 2
Cannabis-induced headache likely represents a form of medication-overuse headache, given that frequent acute medication use leads to increasing headache frequency 2

Reserve opioids only for cases where other medications cannot be used, sedation is not a concern, and abuse risk has been addressed 1, 2
Opioids lead to dependency, rebound headaches, and eventual loss of efficacy 2
If an opioid must be used, butorphanol nasal spray has better evidence than other opioid formulations 2

For severe presentations requiring emergency treatment, use IV metoclopramide 10 mg plus IV ketorolac 30 mg as first-line combination therapy 2
This combination provides rapid pain relief while minimizing side effects and rebound headache risk 2
Prochlorperazine 10 mg IV is comparable to metoclopramide in efficacy for headache relief 2, 4

Evaluate for preventive therapy if cannabis-induced headaches occur frequently (two or more attacks per month producing disability lasting 3+ days) 1, 4
First-line preventive agents include β-blockers (propranolol, timolol), antidepressants (amitriptyline), or anticonvulsants (divalproex sodium) 3