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- #201
If you heat antibiotics they lose effectiveness.
That’s why I heat the oils and add the antibiotic ointment once the mixture is cooling. On re-reading I see I wasn’t perfectly clear on that, it reads like I just heat and add. Sorry.
It’s a slow process with a double boiler and constant stirring (45minutes to 1.5 hours of stirring). I go maximum 2 degrees Celsius above the point where the Vaseline starts to liquify, which although above room temperature isn’t really “hot”. Mineral oil is liquid at room temperature and this seems to be the point the two oils will remain in smooth combination at. I stir constantly, as it begins to trace I put the ointment into it, so it’s already cooled enough that it’s slightly warm to my touch (but I have very cold hands) the end product is much softer than Vaseline at room temperature.
If it’s too hot when you mix the antibiotic in the mix turns grainy and you know you’ve ruined it. I did several test batches before I got the quantities and temperatures for mixing right. I use the 375g Vaseline tub, about 3 1/2 -4 shot glasses of mineral oil, and the antibiotic tube. It makes it easier to work with in the fall when if I’m using straight Vaseline it is really solid and hard to apply and spread.