Vicks DayQuil Multi-Symptom Cold/Flu Relief Side Effects

Please note - some side effects for Vicks DayQuil Multi-Symptom Cold/Flu Relief may not be reported. Always consult your doctor or healthcare specialist for medical advice. You may also report side effects to the FDA.

Side Effects of Vicks DayQuil Multi-Symptom Cold/Flu Relief - for the Consumer

Vicks DayQuil Multi-Symptom Cold/Flu Relief

Applies to: capsules; tablets

All medicines may cause side effects, but many people have no, or minor, side effects. Check with your doctor if any of these most COMMON side effects persist or become bothersome when using Vicks DayQuil Multi-Symptom Cold/Flu Relief:

Dizziness; excitability; headache; nausea; nervousness or anxiety; trouble sleeping; weakness.

Severe allergic reactions (rash; hives; itching; difficulty breathing; tightness in the chest; swelling of the mouth, face, lips, or tongue); difficulty urinating; fast or irregular heartbeat; hallucinations; seizures; severe dizziness, lightheadedness, or headache; stomach pain; tremor; yellowing of skin or eyes.

This is not a complete list of all side effects that may occur. If you have questions about side effects, contact your health care provider. Call your doctor for medical advice about side effects. To report side effects to the appropriate agency, please read the Guide to Reporting Problems to FDA.

Side Effects by Body System - for Healthcare Professionals

Applies to: oral capsule; oral liquid; oral powder for reconstitution; oral suspension; oral syrup; oral tablet

Hepatic

Hepatic side effects of acetaminophen have included severe and sometimes fatal dose dependent hepatitis in alcoholic patients. Hepatotoxicity has been increased during fasting.

Nervous system

Nervous system side effects of dextromethorphan have included drowsiness and dizziness. Other side effects such as excitation, mental confusion, and opioid like respiratory depression have been rare and occurred at higher dosages. In some cases of abuse, patients experienced euphoria, hyperactivity, mania, and auditory and visual hallucinations.

Nervous system side effects of phenylephrine have included headache, dizziness, nervousness, restlessness, tremor, insomnia, convulsions, and central nervous system depression.

Cardiovascular

Cardiovascular side effects of phenylephrine have included palpitations, arrhythmias, and cardiovascular collapse with hypotension.

Gastrointestinal

Gastrointestinal side effects of dextromethorphan have included upset stomach.

Gastrointestinal side effects of phenylephrine have included nausea.

Hypersensitivity

Hypersensitivity side effects of dextromethorphan have included rare reports of fixed-drug eruptions.

Respiratory

Respiratory side effects of phenylephrine have included respiratory difficulty.

Genitourinary

Genitourinary side effects of phenylephrine have included dysuria.

General

General side effects of phenylephrine have included pallor and weakness.

Psychiatric

Psychiatric side effects of phenylephrine have included hallucinations, fear, and anxiety.

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