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Animal studies on Amrix (cyclobenzaprine ER) and pregnancy suggest that the medication is probably safe for pregnant women. No problems occurred when the active ingredient of the drug was given to pregnant rats, rabbits, and mice. However, animals do not always respond to drugs the same way that humans do. If you are taking Amrix and pregnancy occurs, notify your healthcare provider.

An Overview of Using Amrix During Pregnancy

Amrix® (cyclobenzaprine ER) is a long-acting prescription muscle relaxant. Based on the results of animal studies, it appears that Amrix is probably safe for use in pregnant women, although the full risks are not currently known.

Amrix and Pregnancy Category B

The U.S. Food and Drug Administration (FDA) uses a pregnancy category system to classify the possible risks to a fetus when a specific medicine is taken during pregnancy. Pregnancy Category B is given to medicines that have not been studied in pregnant humans but do not appear to cause harm to the fetus in animal studies.
Cyclobenzaprine (the active ingredient in Amrix) has been studied in pregnant rats, rabbits, and mice and did not cause any problems, even at very high doses.
However, it is important to note that animals do not always respond to medicines the same way that humans do. Therefore, a pregnancy Category B medicine should be given to a pregnant woman only if a healthcare provider believes that the benefits to the pregnant woman outweigh any possible risks to the unborn child.

Final Thoughts on Amrix and Pregnancy

If you are pregnant or thinking about becoming pregnant, let your healthcare provider know. He or she will consider both the benefits and risks of using Amrix during pregnancy before making a recommendation for your particular situation.
Written by/reviewed by:
Last reviewed by: Kristi Monson, PharmD;
Last updated/reviewed:
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