Can I safely take mucous relief medicine while taking dayquil and nyquil?

Medications. Usually that is fine. Are you taking dayquil and nyquil for allergy? Have you tried any of the over the counter medicines such as zyrtec or or alegra? If you need a night time allergy med, you can get Benadryl (diphenhydramine) 25 mg for that. Drinking lots of water is a good way to thin the mucus, esp with lemon and honey. see www.grossaninstit.