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Gilmer, TX
A 27-year-old female asked:

If i had an allergic reaction to atenolol, what's the likelihood of having a reaction to metoprolol tartrate? also, how long before metoprolol works?

1 doctor answer5 doctors weighed in
Dr. John Munshower
Family Medicine 30 years experience
That depends: They are in the same class, so if you got tired for example, that is really a class effect, and some Beta Blockers (BB) may cause more lethargy than others, etc. If you were allergic to a component of the Atenolol, than another BB may be fine. Usually, you should see effects for BP and Heart rate lowering in a few days, some people even immediately. Best wishes.

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Last updated Apr 17, 2015

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