Failing it being available . . . we used the NEIL MED saline wash in the squeeze bottle.
Then we went to the colloidal silver available from
The potency of their silver, per our research, far outstrips almost far outstrips all others. One other is slightly in the same ballpark but still significantly below this brand--in our experience. Both these top two come in 200ppm.
We haven't checked about for the general public but a much more potent concentration ppm may be available. That allows significant dilution down to 200ppm.
But we think it would be great to have Zicam back. Housmate's nose has been hypersensitive all his life and he still has a good sense of smell even after using a fair amount of Zicam when it was available.
I am a big fan of Colloidal Silver.
Gargling it and pouring a little up my nose seems to knock down a cold a day or two sooner than it would have without it.
Anecdotal, I know.