New prescription of fluoride is 2800ppm previously 5000 - confused

[A196x]

I’ve been on prescription Fluoride as dentist advised and wrote due to my wear and sensitivity. I have always been on 5000. This was what previous norm dentist gave and that was maybe 2 years ago and up until last month it was 5000. I then advised public dentist that ran out as it’s them I’m under now and I’ve checked the prescription and notice it’s a bigger tube (yay) as more but that it says 2800 instead. Rather than the usual smaller one at 5000. I wondered is there much difference, should I say to them? I regularly get checks up and fluroide varnish applied often because of teeth needs.
Just unsure if 2800 will be fine and odd that its changed when everything still same

 

[Gordon]

Probably somebody wrote the wrong thing on the prescription. Phone and double check with them.
There's not a huge difference between the 2 so it's no big deal if you want to leave it for a bit and not phone.