Alcohol swabs
Two per injection, one for the stopper and one for the skin. Buy the two hundred, it is cheaper per swab and you will not run out mid month.
What is in the sachet
A two ply non-woven pad saturated with 70% isopropyl alcohol, sealed in its own foil sachet so it is still wet when you open it. About 65 by 30mm opened out, which is the size that covers a stopper top and a patch of skin without folding.
Seventy per cent rather than higher is deliberate. Alcohol needs water present to work on a bacterial cell wall, and neat isopropyl evaporates before it has done the job. Stronger is not better here.
Buying them
Two swabs per injection is the normal rate, one for the top of the vial or the pen and one for the skin, which is why these run out faster than anyone expects. The 200 box works out cheaper per swab than the 100 and takes up almost the same shelf.
Let the skin dry before the needle goes in. Alcohol stings on a wet injection site, and it has not finished working until it has evaporated.
Everything on the box, before you buy.
The incumbents make you register to see a price. The batch and the expiry you are shipped are the ones printed here.
Questions about alcohol swabs
If yours is not here, the contact form routes to the person who can answer it.