Hi all!

I've started thinking about travelling to the USA for a long period of time to study a degree but the first thing I need to check off my list is the possibility of having oxigen there. I'm from Spain and here I can get it from the public health care for free. What would be the best and cheapest option for me? I think I'll have to get an insurance that includes it. But what is it? How does it appear in the insurance policy? Then, the first thing upon arrival is talking to a doctor (neurologist) who can prescribe it and convince him. Is that right? Can I speak directly with the insurance company to explain that I need the oxygen and get it without doctor intervention? Thank you!

If you are trying to cope with a busy academic schedule you know that you will be away from your living quarters much of the time. Not very convenient if you need oxygen.

Suggest you consider using a more convenient  form of abortive to use when on the move. That doesn't prevent you from also having oxygen in you living quarters.

For Cluster, injection Imitrex is clearly excellent but you migh consider the folloiwing, pill which is almost as fast acting as Imitrex, less expensive, too. Pill also avoids any public exposure around use of a needle.
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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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Regardless of what abortive you use, if you will be in a large college or university, they will have a medical service whlch can support you around prescriptons, and so on. Just bring a copy of you full medical record with you when you come here.