Inactive ingredients in the medication may cause allergic reactions or other complications
Office of Dietary Supplements, US National Institutes of Health
Possible side effects include: Mild pain, redness, or swelling at the injection site Headache or dizziness (usually transient) Nausea (uncommon) Hypokalaemia (low potassium) during initial treatment, particularly in severely deficient patientsthis is rare but may require monitoring [1] [5] When to seek medical advice: Serious adverse reactions are extremely rare
(PubMed) Kuzminski AM, Del Giacco EJ, Allen RH, Stabler SP, Lindenbaum J
Oral capsules need to be of at least 1000mcg strength, and while these can be purchased from pharmacies most of the vitamin B12 capsules are of much lower strength so it is important to check this
while many peptides tolerate saline at reconstitution, the published research-peptide protocols use bacteriostatic water as the consistent standard, and deviating introduces an unknown variable