Praise be to Allah.
The Standing Committee for Academic Research and Issuing Fatwas said:
“There is nothing wrong with you taking these injections during the day for the purpose of medical treatment, and you do not have to make up for those fasts. If you can take them at night without that causing you any hardship, that is better.”
And Allah is the Source of strength. May Allah send blessings and peace upon our Prophet Muhammad and upon his family and Companions.” (Fatawa al-Lajnah al-Daimah, 10/252)
And Allah knows best.