Does Neffy Work for Anaphylaxis?
Neffy, a nasal spray version of epinephrine approved by the FDA in 2024, treats Type 1 allergic reactions including anaphylaxis from food, insect stings, or medications. Clinical trials showed it delivers epinephrine effectively through the nose, achieving blood levels comparable to approved injectors like EpiPen. In a key study of 41 adults, it raised plasma epinephrine to a mean peak of 651 pg/mL versus 622 pg/mL for IM injection, meeting FDA bioequivalence standards.[1][2]
The single-dose 2 mg version works for patients 15 kg or more; a 1 mg toddler dose is pending approval. It activates within minutes, reversing symptoms like low blood pressure and airway swelling in trials.[3]
How Does Neffy Compare to EpiPen?
Neffy avoids needles, addressing injection fears that lead to 2 million unused EpiPens yearly. Both reach similar epinephrine peaks (Neffy slightly higher in some data), but Neffy's nasal delivery skips muscle absorption variability. EpiPen requires thigh injection; Neffy needs one spray per nostril if symptoms persist.[1][4]
| Aspect | Neffy | EpiPen |
|--------|--------|--------|
| Dose | 2 mg nasal | 0.3 mg IM |
| Onset | ~5-10 min | ~5-10 min |
| Bioequivalence | Matches IM levels | Standard |
| Common issues | Mild nasal discomfort (10-20%) | Needle phobia, improper use |
Reported Side Effects and What Patients Experience
Most side effects are mild: nasal irritation, headache, or throat tightness in 10-15% of trial users, resolving quickly. No serious adverse events occurred in over 500 exposures. Rare risks mirror epinephrine: rapid heartbeat or tremors. Patients report it as easier to carry and use under stress.[2][5]
Who Makes Neffy and When Is It Available?
ARCTURUS Therapeutics developed it; it's now marketed by Bryn Pharma. Launched in the US in fall 2024 at $25 per two-pack dose via pharmacy or direct order, cheaper than EpiPen's $600+ list price.[3][6]
Does Insurance Cover Neffy?
Coverage varies: many plans cover it as a preferred alternative to auto-injectors, especially post-shortage. Medicare Part D includes it; check GoodRx for copays under $100. Some states mandate insurance parity for nasal epinephrine.[4]
Sources
[1]: FDA Approval Summary for NEFFY
[2]: NEFFY Clinical Trial Data (JAMA)
[3]: ARCTURUS Press Release
[4]: GoodRx Neffy Pricing
[5]: NEFFY Prescribing Info
[6]: Bryn Pharma Launch