Most scholars, including the Islamic Fiqh Academy, hold that non-nutritive injections under the skin or into the muscle do not break the fast, so a prescribed peptide pen can usually continue during Ramadan. The practical change is timing: most patients move their dose to after iftar or before suhoor. Weight-loss peptides need extra care because of dehydration and low blood sugar. Ask your physician to adjust your plan before Ramadan starts, and ask a trusted scholar if you are unsure about the religious ruling.