Powerful Sinus Relief for Day or Night. NyQuil Sinex Nighttime Sinus Relief LiquiCaps relieves your worst nighttime sinus symptoms-- nasal and sinus congestion, sinus pain and sinus pressure. Non-drowsy DayQuil Sinex LiquiCaps relieves your worst daytime sinus symptoms-- nasal and sinus congestion and sinus pressure. DayQuil Sinex Sinus Relief LiquiCaps: Temporarily relieves nasal and sinus symptoms including sinus pain, headache, nasal and sinus congestion. Non-drowsy. NyQuil Sinex Nighttime Sinus Relief LiquiCaps: Temporarily relives nasal and sinus symptoms including sinus pain, headache, nasal and sinus congestion, runny nose and sneezing. When using DayQuil or NyQuil products, carefully read each label to ensure correct dosing. Use as directed. Keep out of reach of children.