Insulin change by allergic reaction

Hello, today we have had telephone consultation with the endocrine (until now they have been face -to -face), I have told him that my son has had 3 episodes (the last day before yesterday) as an allergic reaction in the skin (urticaria), this has happened to him3 times after putting the fast insulin, and they have been in different areas (belly, legs and arm), he told me that I was going to change the fast insulin (Humalog) to another called Fiasp, which is very effectivelyFaster, he told me that he doesn't have to make waiting time to start eating, do you use Fiasp?How is it going?The next appointment already in June, face -to -face, because they will make a glycosilada, for now I see that data for Nightscout's reports and has 5.7% but I don't know to what extent it will be reliable ...

I use the two fast you are talking about.Fiasp m I put it in the morning for breakfast, before I did not control the peaks and with this insulin it is doing well since it begins to take effect not at the time, but before the novorapid.For my work schedules, I can't get up an hour before breakfast, so it is insulin m help a lot.
The novorapid uses it in the rest of meals.I always say I am going to leave it and use only the fiasp, but as more or less it is good for me, I am lazy to change with everything it carries.
Keep in mind that FIASP usually puts less units than with Novorapid, you will have to try.

You can trust the results that applications give you, they are not 100%, but they approach a lot.The last time, I had a little more in the laboratory, but I was waiting for me since it almost always measures a downward tad.

Thank you @anaisabel, at the moment the endocrine has told me to continue maintaining the same units as with Humalog, I will try to see ...
In comparison with Humalog, you know if the FIASP effect lasts more, or is it more or less the same?

Hello.I use Fiasp and I do very well.The truth is that I cannot compare, because since I debuted it is the only fast I have used, but the result is good.With her I can control the glycemia of the different meals well and put it on myself just before starting to eat (at most 5 minutes before, according to the day).

Fiasp lasts less than Novorapid, Humalog I don't know.

I am going to write a separate post because already in the first dose and has had a hypoglycemia at hour and a half .....

You have to put less units