Abstract Details

Title Safety of Concomitant Triptan and INP104 Use From the Phase 3 STOP 301 Study in Migraine Patients

Topic Headache

Presentation(s) P14 - Poster Session 14 (11:45 AM-12:45 PM)

Poster/Presentation
Number 2-011

Objective To report safety in migraine patients who used a triptan within 24 hours of INP104 administration.

Background INP104 is a combination of dihydroergotamine mesylate (DHE) and Precision Olfactory Delivery approved for the acute treatment of migraine. DHE and triptans act on 5-HT_1B/1D receptor subtypes, which contributes to their vasoconstrictive effects; therefore, administering 5-HT₁ agonists (eg, sumatriptan) within 24 hours of DHE use is contraindicated.

Design/Methods STOP 301 was a Phase 3 open-label study assessing the safety, tolerability, and exploratory efficacy of INP104 in migraine patients. Eligible patients were provided INP104 to nasally self-administer (1.45 mg) with self-recognized migraine attacks over 24 weeks, with a subset continuing to 52 weeks. Only non-ergot, non-triptan acute therapies for migraine were allowed as rescue medication within 2 hours of INP104 administration.

Results Over 24 weeks, 354 patients self-administered ≥1 dose of INP104. Despite being instructed NOT to take triptans during the treatment period, 10 patients used triptans within 24 hours of INP104 use on ≥1 occasion. Seven of the 10 patients reported 15 treatment-emergent adverse events (TEAEs); only 2 TEAEs occurred within 24 hours of concomitant triptan/INP104 use. These included nasal congestion (possibly INP104 related) on the day of INP104 administration, which resolved before subsequent triptan use on the following day (~6 hours later) and epistaxis 2 days after concomitant triptan and INP104 use (unlikely related to INP104 or INP104/triptan use because epistaxis is not anticipated for either product). The remaining 5 patients had various TEAEs that were not temporally related to triptan/INP104 use. No TEAEs related to blood pressure, pulse, or electrocardiogram parameters were reported, and any variance was within normal clinical limits.

Conclusions Although in a small population, the safety of concomitant triptan/INP104 use was reported, which is an important topic for the patient/physician dialogue.

Authors/Disclosures
Sheena K. Aurora, MD (Department of Neurology and Neurological Sciences) PRESENTER	Dr. Aurora has received personal compensation for serving as an employee of Alzheimer's Association.
Alexander Feoktistov, MD, PhD (Diamond Headache Clinic)	Dr. Feoktistov has received personal compensation in the range of $500-$4,999 for serving as a Consultant for Upsher-Smith. Dr. Feoktistov has received personal compensation in the range of $10,000-$49,999 for serving on a Speakers Bureau for Abbvie. Dr. Feoktistov has received personal compensation in the range of $10,000-$49,999 for serving on a Speakers Bureau for Eli Lilly. Dr. Feoktistov has received personal compensation in the range of $5,000-$9,999 for serving on a Speakers Bureau for Amgen. Dr. Feoktistov has received personal compensation in the range of $5,000-$9,999 for serving on a Speakers Bureau for Lundbeck. Dr. Feoktistov has received personal compensation in the range of $500-$4,999 for serving on a Speakers Bureau for Biohaven. Dr. Feoktistov has received personal compensation in the range of $500-$4,999 for serving on a Speakers Bureau for Impel.
Robert Vann, PhD (C2N Diagnostics)	Dr. Vann has received personal compensation for serving as an employee of Impel Neuropharma. Dr. Vann has received personal compensation for serving as an employee of Biogen.
Judie B. Gutierrez, PhD (Eli Lilly)	Dr. Gutierrez has received personal compensation for serving as an employee of Impel Pharmaceuticals. Dr. Gutierrez has stock in Impel Pharmaceuticals.
Sutapa Ray, PhD (Impel NeuroPharma)	Dr. Ray has received personal compensation for serving as an employee of Impel Pharmaceuticals. Dr. Ray has stock in Impel Pharmaceuticals.
Stephen B. Shrewsbury, MD (Impel Pharmaceuticals)	Dr. Shrewsbury has received personal compensation for serving as an employee of Impel NeuroPharma. Dr. Shrewsbury has received stock or an ownership interest from Impel NeuroPharma.

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