There are so few docs outside of major medical centers who have knowledge/skill in treating complex headache disorders that I'd suggest making a move to a headache clinic. Your present treatment plan is inadequate.

Since, I take your intro to say, you are in GB, would suggest you make contact with your excellent support group:   Multimedia File Viewing and Clickable Links are available for Registered Members only!!  You need to or

I understand that you have the right to move directly to a headache clinic for care. OUCHUK can guide you with your healthcare system.

I'd encourage you to avoid any effort at self-help treatment--this will only sustain your pain. A solid treatment program is necessary.

See the PDF file, below. It will give you an outline of current therapies for Cluster.

Do some basic learning as you proceed to locate a good source of treatment.
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Cluster headache.
From: Multimedia File Viewing and Clickable Links are available for Registered Members only!!  You need to or (Orphanet Journal of Rare Diseases)
[Easy to read; one of the better overview articles I've seen. Suggest printing the full length article--link, line above--if you are serious about keeping a good medical library on the subject.]

Leroux E, Ducros A.

ABSTRACT: Cluster headache (CH) is a primary headache disease characterized by recurrent short-lasting attacks (15 to 180 minutes) of excruciating unilateral periorbital pain accompanied by ipsilateral autonomic signs (lacrimation, nasal congestion, ptosis, miosis, lid edema, redness of the eye). It affects young adults, predominantly males. Prevalence is estimated at 0.5-1.0/1,000. CH has a circannual and circadian periodicity, attacks being clustered (hence the name) in bouts that can occur during specific months of the year. ALCOHOL IS THE ONLY DIETARY TRIGGER OF CH, STRONG ODORS (MAINLY SOLVENTS AND CIGARETTE SMOKE) AND NAPPING MAY ALSO TRIGGER CH ATTACKS. During bouts, attacks may happen at precise hours, especially during the night. During the attacks, patients tend to be restless. CH may be episodic or chronic, depending on the presence of remission periods. CH IS ASSOCIATED WITH TRIGEMINOVASCULAR ACTIVATION AND NEUROENDOCRINE AND VEGETATIVE DISTURBANCES, HOWEVER, THE PRECISE CAUSATIVE MECHANISMS REMAIN UNKNOWN. Involvement of the hypothalamus (a structure regulating endocrine function and sleep-wake rhythms) has been confirmed, explaining, at least in part, the cyclic aspects of CH. The disease is familial in about 10% of cases. Genetic factors play a role in CH susceptibility, and a causative role has been suggested for the hypocretin receptor gene. Diagnosis is clinical. Differential diagnoses include other primary headache diseases such as migraine, paroxysmal hemicrania and SUNCT syndrome. At present, there is no curative treatment. There are efficient treatments to shorten the painful attacks (acute treatments) and to reduce the number of daily attacks (prophylactic treatments). Acute treatment is based on subcutaneous administration of sumatriptan and high-flow oxygen. Verapamil, lithium, methysergide, prednisone, greater occipital nerve blocks and topiramate may be used for prophylaxis. In refractory cases, deep-brain stimulation of the hypothalamus and greater occipital nerve stimulators have been tried in experimental settings.THE DISEASE COURSE OVER A LIFETIME IS UNPREDICTABLE. Some patients have only one period of attacks, while in others the disease evolves from episodic to chronic form.

PMID: 18651939 [PubMed]
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Explore:

A couple of sites which are worth your attention: medical literature, films, plus the expected information
about CH.

Multimedia File Viewing and Clickable Links are available for Registered Members only!!  You need to or
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Multimedia File Viewing and Clickable Links are available for Registered Members only!!  You need to or Search under "cluster headache"

Thank you for your replies, I managed to get an appointment with an out of hours doctor today who seemed to understand CH more than my own GP he has given me 2 single dose imigran nasal sprays and Co-dydramol.  I have been out and bought some energy drinks as advised but
I have to say I am sitting here now at 10pm and am exhausted but too scared to go to bed.  I hope this stuff works but dont think I can cope with another night like last night.  I am going to see my GP on monday and will ask about a headache clinic (I never knew they existed).

Hi again
Well I went to see my own GP today and am now torn between upset and angry (get ready for a rant).  I have had several really bad nights, hubby has been kept awake too.  When I saw the out of hours doctor on Saturday he only gave me 2 doses of the imigram nasal spray, which I am still unsure about but have run out of now anyway(don't really know what to expect from it).
Anyway I walked into my GP armed with loads of information (for the first time since I was diagnosed)  unfortunately the beast kicked in in the car on the way to the docs, hubby was driving while I was crying and thinking at least the doctor will have to believe me this time.
The result an appointment that lasted less than 5 minutes another course of prednisilone, 2 more imigran nasal sprays and nortriptolene (spelling) tablets.  I asked for a referral to a headache clinic or a neurologist and was told it wasnt necessary it would just take trial and patience to get my MIGRAINES under control.  I reminded the doctor that a neorologist has already diagnosed Cluster Headaches and that there is a difference and mentioned that the prescription was for just 2 imigran again and that I am having a few headaches a day and definately one really bad one at night, he said just use the imigran when i really need it and hopefully with the steriods i will be ok in a couple of days. 
Now I may be moaning about nothing here but remember than throughout this conversation i was gripping my head and struggling to focus on a conversation as well as stay in a seat with tears streaming down my face.  I feel that I have just been brushed off again.  Before I left hubby booked me an appointment with another doctor for the day after tomorrow
Am I over reacting here, is it right just to be getting 2 nasal sprays at a time and is the other stuff going to do me any good.

ok I feel a bit better now, thought maybe I was over reacting.  Unfortuntely I live in the UK which means that unless I go private (not an option financially) I need to be referred to a neurologist by a gp or be admitted to hosp to see one (which if the last few nights are anything to go by is actually becomming an option, if only for a bit of relief)
Thanks for the words of encouragement.
Julie

Yes there are other doctors and hubby has booked me an appointment with one of the others for day after tomorrow (knowing I will have run out of imigran by then).  Can I also check dosage with you guys I have just done a bit of reading and my nortripyline at 10mg per day seems very low.  My Imigran spray is a 10 mg dose and i am allowed one per 24 hours

Please! resolve the question about your location--it's messing up the kinds of information we can usefully offer!
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Please tell us where you live. Follow the next line to a message which explains why knowing your location and your medical history will help us to help you.

Cluster Headache Help and Support › Getting to Know Ya › Newbies, Help us...help you
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IF you are in the UK, contact the support group I first metioned. They can guide you to a headache clinic and not get caught in a cycle of referrals, etc.