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This 28-day window is based on two factors: peptide stability and bacteriostatic efficacy
Most people start to notice an improvement in symptoms from vitamin B12 deficiency within the first week
Though it differs a bit from one person to another, the effects of B12 vitamins usually last around 48 hours to 72 hours after the initial injection
Cyanocobalamin contains a cyanide molecule instead of a methyl group, making it inactive and potentially harmful
Before injecting, let the medication warm to room temperature for 1530 minutes if it was refrigerated
That's why it's important to let your doctor know if you have any of the following conditions before you're prescribed hydroxocobalamin: If you've had an allergic reaction to hydroxocobalamin or any other medicines in the past If you've been diagnosed with low levels of potassium If you have an irregular or fast heartbeat Once you've started taking hydroxocobalamin, you may have some side effects such as pain, swelling, or itchy skin at the point where the syringe was injected
