I've never come across the product here in the United Kingdom.
The active ingredient is
zinc gluconate (plus glycine but that's just to mask the taste.)
Originally I used to use expensive Nasal Decongestants such as Afrin, but then a discovered that an el-cheapo product form the "99p store" had exactly the same effect at 1/8 the price
Nice.
Knowing the active ingredients and then going with generics for OTC drugs can save a ton. The cheap one may be phenylephrine rather than oxymetazoline(*), but for flight use there's little or not difference.
(* or they might both be something else entirely; OTC drugs do differ a bit across the Atlantic.)