aspirin during pregnancy

Ok so I totally forgot to ask my dr this but she put me on low dose of aspirin 81 mg because I'm at risk for preeclampsia I'm supposed to start taking it today that I am 12 weeks but I forgot to ask is it ok if I take it together at the same time as my prenatal ? 
I like to take my prenatal at night before bed and on the paper that comes with the aspirin it says it's best to take at evening as well is it ok if I take them at the same time ? 

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