I love it when I'm right about something especially if it pertains to the cats-and only because it means I'm not crazy.
In December I observed that unlike prior bottles of compounded Prozac we give our cat Jimmy Stewart (litter box anxiety issues) the December bottle was causing him to react severely to it by shaking his head whenever I squirted the syringe of med into his mouth. He wasn't foaming but I thought perhaps it was bitter. The med also looked differently. In the past it was cloudy and this was a clear liquid. The pharmacy redid it and added more flavoring but it was still clear, which they couldn't explain, and still produced a reaction.
When it was time to renew the script for January, I decided to taste the med to see what Jimmy was tasting. It was spicy. I told the pharmacist that it was spicy and they looked into their source materials. They always log in what recipe and which products were used to compound the med. While the recipe was the same, they checked each component and found that indeed the chicken flavor used in December, while the same type of liquid formula, was from a different company. They tasted the flavoring and found it to be spicy. So, I was RIGHT! There was a difference and Jimmy had been telling me all along.
Oddly enough, the Buprenex we have compounded for other cats, also uses the same chicken flavor as was in December's Prozac. BUT-the Buprenex med mixed with the chicken flavor makes the compounded med taste sweet instead of spicy. So, hence the reason we had no negative reactions from the other cats when dispensing Buprenex.
This month's Buprnex was made with a chicken powder and the new med actually tastes like chicken broth. The pharmacy can't use a powder flavoring agent with the Prozac recipe but has ordered other chicken flavors from a new source. We'll see what that is like before using it in this month's Prozac recipe.
Lesson learned-if you think something's wrong, it probably is. Try to figure it out first and then tell the doctor/pharmacy/plumber/car mechanic, etc. exactly what you found out and that might help them pin point the real problem to solve it.