Sep 3, 2024 · People often report side effects while taking NyQuil. Here are eight NyQuil side effects to keep in mind and how to manage them.

Jul 23, 2025 · It may increase your risk of liver damage while you are taking acetaminophen, and can increase certain side effects. This medication may cause blurred vision and may impair your thinking …

Nov 24, 2025 · Because Dayquil and Nyquil products contain different active ingredients, review the ingredients in your specific product to understand which side effects you might experience.

Jun 17, 2025 · When a person takes certain medications or supplements, they might experience an upset tummy as their body adjusts to the new substance. This can manifest as mild to severe …

Jul 18, 2023 · While Nyquil can be effective in relieving symptoms, it may also cause some side effects. Common side effects include drowsiness, dizziness, dry mouth, upset stomach, and constipation. …

Learn about the side effects of Vicks Nyquil Cough (dextromethorphan/doxylamine), from common to rare, for consumers and healthcare professionals.

Dec 5, 2025 · NyQuil is generally safe when used as directed, but users should be aware of both common side effects and the potential for rare but serious allergic reactions. By knowing what to …

NyQuil, just like other cold medications, may seem like a harmless everyday remedy to manage cold and flu but still carries the potential to trigger side effects, like allergies, rash, blurry vision, stomach …

Jan 8, 2024 · Learn about Nyquil Cold and Flu usage and dosing. Read the latest news and reviews about the drug as well as potential side effects and popular alternatives.

May 31, 2023 · Like most medications, Nyquil can cause some side effects, but they are relatively rare. Serious side effects of Nyquil are even rarer, but they can still occur. It’s important to know what …