In the US, it may be used off-label by qualified medical providers as an investigational therapy
Go to urgent care, ER now if you feel any of these Seek emergency care if black stool happens with: Dizziness , fainting, or feeling about to pass out Weakness , shortness of breath, fast heartbeat Severe belly pain Vomit with blood or vomit that looks like coffee grounds Repeated black, tarry stools These can be signs of a serious GI bleed and possible internal bleeding
And enforcement priorities continue to evolve
However, much work is still needed on this topic
The medication itself and the platform that delivers it
The liver stores vitamin B12, sometimes in amounts sufficient for years, which is why deficiency can develop slowly