Yes, you can take both of these meds together. Sudafed is a decongestant and should help clear out a stuffy, runny nose, while Zyrtec is an antihistamine that works to stop the allergic response in your body and should help reduce symptoms such as runny nose, sneezing and itchiness in your mouth, nose and eyes.
Sudafed can make you sleepy though, so use caution in operating machinery or driving while under its influence.
Best,
Kathi
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