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Vitamin B9 (Folate): Function: Folate is important for cell division and growth, the synthesis of DNA and RNA, and the formation of red and white blood cells

Traditionally, vitamin B12 replacement is administered intramuscularly

Couture Med Spa reports a similar pattern among its own tirzepatide and semaglutide patients, listing mild nausea or upset stomach, temporary irritation at the injection site, fatigue or headaches, and changes in appetite, and adds that most side effects fade as the body adjusts to treatment (couturemedspa.com)

Both oral cyanocobalamin and injectable hydroxocobalamin list diarrhoea as a rare adverse reaction in UK product information

Tell your clinician about any personal or family history of optic nerve disease before starting treatment