Both formulations were discontinued in 2008 1
According to Ali Kalenak, a registered nurse and founder of Remedie Hydration Therapy in Jackson, Wyoming, most B12 shots come in 1,000 mcg doses

Dietary strategies can significantly reduce digestive discomfort: Eat smaller, more frequent meals rather than large portions that may overwhelm your slowed digestive system Choose bland, easily digestible foods during the initial adjustment period, avoiding high-fat, spicy, or heavily processed foods Stay well-hydrated , particularly if experiencing diarrhea, aiming to maintain pale yellow urine (unless you have fluid restrictions due to heart failure, kidney disease, or other conditions) Increase fiber gradually if constipation develops, through fruits, vegetables, and whole grains Avoid lying down immediately after eating to reduce nausea and reflux symptoms Some patients report that administering the weekly injection on a day when they can rest if neededsuch as Friday evening or Saturday morninghelps them manage any temporary increase in symptoms
It is highly improbable
Adjust your dosing pace to allow gradual adaptation, and discuss mood changes openly with your provider
Apply your serum immediately, within 60 seconds of cleansing