had b12 injection but still tired Feeling worse after Injection: Answering concerns Why Do I Feel Worse

While these conditions sound alarming, there is no need to worry if you act quickly

All orders are subject to approval

Application: Laboratory & in-vitro research only

Eneroth H, El Arifeen, S, Persson LA, et al

Keep needles sharp and clean

Patients should seek emergency medical help (call 999) if they experience: Difficulty breathing, wheezing, or throat tightness Swelling of the face, lips, tongue, or throat (angioedema) Widespread urticarial rash (hives) developing rapidly Dizziness, fainting, or rapid heartbeat suggesting anaphylaxis These symptoms typically occur within minutes to hours of administration, most commonly with injectable preparations