Q: What is the ruling on injections and taking pills whilst fasting?
A: Shaykh Ahmed Al-Najmi rahimahullaah said:
As for taking pills then no doubt it breaks one’s fast, no scholar says otherwise. As for taking injections whilst fasting then if it is in the vein then it breaks one’s fast. However, if the injection is in the muscle then it is safer not to do it unless there is dire need.
Fataawa no. 272