And how long it last to next dosage
What are you taking it for? It will take a few doses until it reaches full effect. The thing with metoprolol is its got a wide dosing range, 50 is pretty low. Metoprolol tartrate is short acting so you need to take it like every 6 hrs. Once you find what dose you need there is metoprolol succinate which is long acting and you only have to take two a day.
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