Serious but rare risks include pancreatitis (abdominal pain), gastroparesis (severe nausea/vomiting), and allergic reaction
Tablets, B-complex products and fortified foods Adults need about 2.4 micrograms of vitamin B12 a day, according to the National Institutes of Health Office of Dietary Supplements
For alcohol withdrawal : 1-3 grams of acetyl-L-carnitine has been administered by IV for 10 days
Conflict of interest Flynn McGuire, Riley Martinez, Annika Lenz, Lee Skinner, and Dan Cushman declare that they have no conflict of interest
Call 999 or go to your nearest A&E immediately if you experience any signs of a severe allergic reaction (anaphylaxis), including: Swelling of the face, lips, tongue, or throat Difficulty breathing or swallowing Dizziness, collapse, or a sudden drop in blood pressure A rapidly spreading rash with any of the above symptoms For urgent advice when you are unsure or cannot reach your trial coordinator, call NHS 111 (available 24 hours a day)