how often should you take vitamin b12 injections Injections: Who Get Them and Long Do They Last? Vitamin B12 Dosages: Your GoodRx

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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

The ampules you require are 1ml/mg

Find out which ones you may need to skip with the help of this WebMD slideshow

Lab results plus symptoms guide dosing and frequency

Administration Tips for Weekly Dosing When giving Vitamin B12 injections weekly, proper technique is vital