These extremely rare side effects include: Reactive thrombocytosis during the first week of use in megaloblastic anaemia Hypersensitivity reactions including: rash, itching, exanthema, antibodies to HYDR0XOCOBALAMIN-transcobalamin II Anaphylaxis Hypokalaemia Headache, paraesthesia, tremor Irregular heartbeat (arrhythmias secondary to hypokalaemia) Nausea Vomiting Diarrhoea Fever, chills, hot flushes, dizziness, malaise, pain and / or swelling at the injection site Acne Abnormal colouration of the urine (chromaturia) B12 injections work quickly
Low blood sugar levels may also occur, especially if youre taking other medications that lower blood sugar
The singer shared the update with fans in March 2025 via Instagram, revealing she had incorporated GLP-1 into her routine as part of a broader health journey
[DOI] [PMC free article] [PubMed] [Google Scholar] Daniele SG, Braud D, Davenport C, Cheng K, Yin H, Maguire-Zeiss KA (2015) Activation of MyD88-dependent TLR1/2 signaling by misfolded -synuclein, a protein linked to neurodegenerative disorders
Patients should consult their doctor before starting to take Ozempic to learn about these side effects
