Round yellow tablet imprinted with Ivax Logo (an hourglass or bowtie symbol) 3691 on one side and 10 on the other side is 10 mg prochlorperazine.
More info:
http://prochlorperazine.drugs.com/
I'm not a pharmacist or a medical doctor. This message is not medical advice, nor is at an offer to provide medical advice. All drug identifications should be validated by a licensed MD or pharmacist.