We can't answer such questions since it involves insurance companies and a range of coverage plans which differ depending on who is paying for the insurance, the variation in contracts, etc.

I really feel for you guys across the pond.
the thought of not having unlimited access to imigran fills me with dread

An out-of-pocket affordable abortive has not gained mulch attention here, unfortunately. Once I tried it all other abortives went out the window. Worth a try.
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Headache 2001 Sep;41(8):813-6 

Olanzapine as an Abortive Agent for Cluster Headache.


Rozen TD.
Department of Neurology, Jefferson Headache Center/Thomas Jefferson University Hospital, Philadelphia, Pa.

OBJECTIVE: To evaluate olanzapine as a cluster headache abortive agent in an open-label trial. BACKGROUND: Cluster headache is the most painful headache syndrome known. There are very few recognized abortive therapies for cluster headache and fewer for patients who have contraindications to vasoconstrictive drugs. METHODS: Olanzapine was given as an abortive agent to five patients with cluster headache in an open-label trial. THE INITIAL OLANZAPINE DOSE WAS 5 MG, AND THE DOSE WAS INCREASED TO 10 MG IF THERE WAS NO PAIN RELIEF. THE DOSAGE WAS DECREASED TO 2.5 MG IF THE 5-MG DOSE WAS EFFECTIVE BUT CAUSED ADVERSE EFFECTS. To be included in the study, each patient had to treat at least two attacks with either an effective dose or the highest tolerated dose. RESULTS: Five patients completed the investigation (four men, one woman; four with chronic cluster, one with episodic cluster). Olanzapine reduced cluster pain by at least 80% in four of five patients, and TWO PATIENTS BECAME HEADACHE-FREE AFTER TAKING THE DRUG. Olanzapine typically alleviated pain within 20 minutes after oral dosing and treatment response was consistent across multiple treated attacks. The only adverse event was sleepiness. CONCLUSIONS: Olanzapine appears to be a good abortive agent for cluster headache. IT ALLEVIATES PAIN QUICKLY AND HAS A CONSISTENT RESPONSE ACROSS MULTIPLE TREATED ATTACKS. IT APPEARS TO WORK IN BOTH EPISODIC AND CHRONIC CLUSTER HEADACHE.

PMID 11576207 PubMed

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Olanzapine has a brand name of "Zyprexa" and is a antipsychotic. Don't be put off by this primary usage. Several of the drugs used to treat CH are cross over applications, that is, drugs approved by the FDA for one purpose which are found to be effective with unrelated conditions--BJ.
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I am fighting the same battle with my provider over Zomig.  I have been asked to have my doctor send a "statement of medical necessity" to my insurance company.  This has been done, and we are awaiting results. 

Of note - I was in Europe last week and ran out of Zomig.  My doc faxed over a prescription and a hotel concierge located it for me. My cost in the US = $345 for six snorts.  Berlin Cost = $106 for six snorts.  Concierge offered to get it for me anytime I need it, so will be getting lots of scripts from the doc and sending them off to Berlin!

I was having serious problems getting enough Sumatriptan as well.  This site saved me--  I seriously doubted that this was true or that it would work but I printed out their coupon and filled a script at Walgreen's for 9 pills, 9 times in a row (30 days apart) and each time the most I paid was $30.  My insurance still pays for 4 Sumatriptan shots a month.

Multimedia File Viewing and Clickable Links are available for Registered Members only!!  You need to or

On a side note, I've said it before and I'll say it again--Olanzapine is a serious drug with serious side effects.  IMHO not to be taken lightly.  I would really research this drug well before deciding to take it.  My headaches have been constant enough that I eventually did try it, but looking back on it now I think I probably shouldn't have.  Besides the nasty side effects that I got (kinda like restless legs but all over my body, all night) another doctor I know was stressing that even individual doses (as opposed to daily) can cause long lasting tardive dyskenisia symptoms.  Just my 2 cents.

-Ricardo