REPEATED ADMINISTRATION OF DIHYDROERGOTAMINE FOR TREATMENT OF FREQUENT MIGRAINE HEADACHES
Methods are provided for reducing the frequency of migraine attacks in a subject who has frequent migraine headaches with or without aura. The methods comprise intranasally administering to the subject a pharmaceutical composition comprising dihydroergotamine (DHE) or salt thereof on a repeat dose schedule, wherein each intranasal administration is delivered by a manually actuated, propellant-driven, metered-dose administration device, and wherein the schedule is a chronic intermittent schedule in which each of the repeated administrations is performed while the subject is experiencing a migraine headache.
1 . A method of reducing the frequency of migraine attacks in a subject who has frequent migraine headaches with or without aura, comprising:
administering a pharmaceutical composition comprising dihydroergotamine (DHE) or salt thereof via a respiratory tract of the subject on a repeat dose schedule,
wherein the schedule is a chronic intermittent schedule in which each of the repeated administrations is performed while the subject is experiencing a migraine headache.
2 . The method of claim 1 , wherein the step of administering is performed by intranasal administration.
3 . The method of claim 2 , wherein the intranasal administration is performed with a manually actuated, propellant driven, metered dose administration device.
4 . The method of claim 1 , wherein the step of administering is performed by pulmonary administration.
5 . The method of claim 1 , wherein the repeat dose schedule comprises administration of at least a first dose and a second dose of the pharmaceutical composition.
6 . The method of claim 1 , wherein the pharmaceutical composition is a liquid pharmaceutical composition.
7 . The method of claim 1 , wherein each of the doses is administered as two divided subdoses, optionally wherein the divided subdoses are administered into separate nostrils.
8 . The method of claim 3 , wherein the propellant is a hydrofluoroalkane propellant.
9 . The method of claim 8 , wherein the propellant is hydrofluoroalkane-134a.
10 . The method of claim 9 , wherein prior to a first actuation, a vial is nonintegral to the device and is configured to be attached thereto, optionally wherein the vial is configured to be threadably attachable to the device.
11 . The method of claim 1 , wherein each of the doses of the pharmaceutical composition comprises no more than 2.0 mg DHE or salt thereof.
12 . The method of claim 7 , wherein the liquid composition is administered as two divided subdoses in two sprays, wherein each of the two divided subdoses is 140-250 μL.
13 . The method of claim 6 , wherein the liquid composition comprises a salt of DHE.
14 . The method of claim 13 , wherein the liquid composition comprises DHE mesylate, optionally at a concentration of 2.5-7.5 mg/ml.
15 . The method of claim 13 , wherein the liquid composition further comprises caffeine, optionally at a concentration of 10 mg/ml.
16 . The method of claim 13 , wherein the liquid composition further comprises dextrose, optionally at a concentration of 50 mg/ml.
17 . The method of claim 1 , wherein the pharmaceutical composition comprises 4.0 mg/ml DHE mesylate, 10.0 mg/ml caffeine, and 50 mg/ml dextrose.
18 . The method of claim 1 , wherein the subject has at least three migraine attacks in the 4-week period immediately preceding administration of the first dose.
19 . The method of claim 18 , wherein the subject has fewer than 3 migraine headaches during the 4-week period immediately following administration of the second dose.
20 . The method of claim 19 , wherein the subject has fewer than 2 migraine headaches during the 4-week period immediately following administration of the second dose.
21 . The method of claim 1 , wherein the subject has no migraine headaches during the 4-week period immediately following administration of the second dose.
22 . The method of claim 1 , wherein the subject has fewer than 6, fewer than 4, or fewer than 2 migraine headaches during the 8-week period immediately following administration of the second dose.
23 . The method of claim 1 , wherein the subject has fewer than 12, fewer than 6, or fewer than 3 migraine headaches in the 12-week period immediately following administration of the second dose.
24 . The method of claim 1 , wherein the subject has fewer than 18, fewer than 12 or fewer than 4 migraine headaches during the 24-week period immediately following the repeated administrations.
25 . The method of claim 1 , wherein the frequency of migraine headaches is reduced by at least 50%, 60%, or 75% during the 4-week period immediately following administration of the second dose as compared to the frequency of migraine headaches during the 4 week-period immediately preceding administration of the first dose.
26 . The method of claim 1 , wherein administration of the first dose of the repeated administrations of the pharmaceutical composition reduce one or more symptoms selected from pain, nausea, phonophobia, and photophobia.
27 . The method of claim 26 , wherein reduction of the one or more symptoms occurs at 2 hours post administration.
28 . The method of claim 1 , wherein the subject has migraine that does not respond to triptan drugs.
29 . The method of claim 1 , wherein the repeat dose schedule lasts at least one month.
30 . The method of claim 29 , wherein the repeat dose schedule lasts at least two months, at least three months, at least four months, at least five months, or at least six months.