I took mucinex dm almost 13 hours ago, i now want to take nyquil for bedtime, is that safe?

Typically thus is fine, but read all instructions for use and the insert. Nasal saline spray is often effective in reducing the symptoms of congestion and post nasal drip. Test for COVID 19, rest drink fluids. Watch for signs of shortness of breath and fever. Please follow up with your physician, and a virtual consult with Healthtap is available.