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Quality Control Both products should be manufactured under strict sterile conditions

The half-life is the amount of time it takes for half of the medication to be cleared from your system, or more simply, how long the drug continues to work after you take it

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Post-marketing experience also suggests that use more than 24 hours prior to ocular surgery or use beyond 14 days post-surgery may increase patient risk for the occurrence and severity of corneal adverse events

However, it's not entirely clear whether high vitamin B12 blood levels cause PV or the PV disease process may result in high blood levels of vitamin B12