No, it is not safe to mix two different medicines, especially for children.
I don't think that is possible.
Yes.
Yes, you can.
you get messed up
yes of course
Yes but what's the point?
Yes, taking motrin with milk helps reduce irritation and reduces the stomach acid.
only if you want to kill your dog <by jessica>
Nope. You're taking two different pain relievers in the Motrin and the DayQuil and two different allergy medicines in Zyrtec and DayQuil. If you have a cold, take DayQuil by itself. If you have allergies and pain, take Zyrtec and Motrin.
I'm afraid that, even though it's unlikely it would be serious, the pseudoephedrine in the Zyrtec D and the dextromethorphan in the Mucinex could interact with each other. However normal Zyrtec with just cetirizine would be perfectly safe.
Read the back of your bottle, and look at the age specifications. Contact your doctor or local 24 hour pharmacy if you are unclear. On that note if some sixteen year old answered yes would you have?
Motrin.