ANSWERS: 1
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There is not a pill to my knowledge with that marking. Take a second look to see if the numbers are "183" rather than "163". If it happens to be 183 then it would be dextromethorphan, guaifenesin, and phenylephrine which is used as a cough suppressant. Brand names include Certuss-D, Duraphen Forte, Duraphen II DM, Sinutuss DM and roughly 30 others. If the marking is 163 then I would not be able to identify it. Double check the markings and I would be glad to find a positive match.
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