I am on verapamil right now (120 mg), which worked for me before, but it does not seem to have any effect now

Individualizing Treatment With Verapamil for Cluster Headache Patients
Joseph N. Blau, MD, FRCP; Hans O. Engel, FFOM, LRCP&SE
Address all correspondence to Joseph N. Blau, MD, FRCP, City of London Migraine Clinic, 22 Charterhouse Square, London EC1M 6DX, UK.
From the City of London Migraine Clinic.

Copyright 2004 By the American Headache Society
KEYWORDS
cluster headache • treatment • verapamil
(Headache 2004;44:1013-1018)

ABSTRACT
Background.—Verapamil is currently the best available prophylactic drug for patients experiencing cluster headaches (CHs). Published papers usually state 240 to 480 mg taken in three divided doses give good results, ranging from 50% to 80%; others mention higher doses—720, even 1200 mg per day. In clinical practice we found we needed to adapt dosage to individual's time of attacks, in particular giving higher doses before going to bed to suppress severe nocturnal episodes. A few only required 120 mg daily. We therefore evolved a scheme for steady and progressive drug increase until satisfactory control had been achieved.

Objective.—To find the minimum dose of verapamil required to prevent episodic and chronic cluster headaches by supervising each individual and adjusting the dosage accordingly.

Methods.—Consecutive patients with episodic or chronic CH (satisfying International Headache Society (IHS) criteria) were started on verapamil 40 mg in the morning, 80 mg early afternoon, and 80 mg before going to bed. Patients kept a diary of all attacks, recording times of onset, duration, and severity. They were advised, verbally and in writing, to add 40 mg verapamil on alternate days, depending on their attack timing: with nocturnal episodes the first increase was the evening dose and next the afternoon one; when attacks occurred on or soon after waking, we advised setting an alarm clock 2 hours before the usual waking time and then taking the medication.

Patients were followed-up at weekly intervals until attacks were controlled. They were also reviewed when a cluster period had ended, and advised to continue on the same dose for a further 2 weeks before starting systematic reduction.

Chronic cluster patients were reviewed as often as necessary.

Results.—Seventy consecutive patients, 52 with episodic CH during cluster periods and 18 with chronic CH, were all treated with verapamil as above. Complete relief from headaches was obtained in 49 (94%) of 52 with episodic, and 10 (55%) of 18 with chronic CH; the majority needed 200 to 480 mg, but 9 in the episodic, and 3 in the chronic group, needed 520 to 960 mg for control. Ten, 2 in the episodic and 8 in the chronic group, with incomplete relief, required additional therapy—lithium, sumatriptan, or sodium valproate. One patient withdrew because verapamil made her too tired, another developed Stevens-Johnson syndrome, and the drug was withdrawn.

Conclusions.—Providing the dosage for each individual is adequate, preventing CH with verapamil is highly effective, taken three (occasionally with higher doses, four) times a day. In the majority (94%) with episodic CH steady dose increase under supervision, totally suppressed attacks. However in the chronic variety only 55% were completely relieved, 69% men, but only 20% women. In both groups, for those with partial attack suppression, additional prophylactic drugs or acute treatment was necessary.


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Accepted for publication July 19, 2004.

There is no difference.  Welder's O2 has to be just as pure or the welds will be contaminated.

Thanks to everybody for your replies!   I saw my doc yesterday and he gave me a presciption for Imitrex. I got my first hit (KIP 9) after filling my prescription this morning, and within 7 min, it was gone! I can't believe that I've gone this long without an abortive...I was just wondering if there was anybody else out there from Canada who has had trouble getting an O2 prescription from their doc. Mine told me that he couldn't do it, not that he wouldn't. Unfortunately I am unable to get in to see my neuro right away as it has been 3 yrs since my last appointment, and I have to go through the whole referral process again ....I will probably be done this cycle by the time I get an appointment. I was just wondering if there was any difference between Medical O2 and O2 you would get for welding etc...? If there isn't I'm sure that I'd have no problem getting my hands on a bottle and rigging it up. Has anyone tried this?