Can i take zyrtec-d and nyquil cough together?

ZyrtecD+Nyquil Cough: I would recommend that you NOT take these medications together at the same time because doing so will be like taking 5 drugs at the same time. Take the Nyquil Cough before going to bed. If needed, you can take the Zyrtec (cetirizine) D once daily as needed in the morning. Reserve the Nyquil for just before bedtime. If you have diabetes or high blood pressure, check with your doctor first.