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Methylcobalamin injections are generally well-tolerated, but like any injection, they can cause some local reactions at the injection site such as pain, redness, or swelling

OTC medications that may help: One OTC medication that can help reduce histamine levels is diphenhydramine (Benadryl)

Whilst liraglutide's CNS effects are generally milder, the combination could theoretically amplify these symptoms, affecting quality of life and treatment adherence

Breastfeeding Methylcobalamin is distributed into breast milk in amounts similar to those in maternal plasma, and distribution in breast milk allows for adequate intakes of methylcobalamin by breastfeeding infants