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Nyquil Side Effects

Report Nyquil Side Effects

If you experienced any harmful or unwanted effects of Nyquil, please share your experience. This could help to raise awareness about Nyquil side effects, identify uknown risks and inform health professionals and patients taking Nyquil.

Examples: headache, dizziness


The most commonly reported Nyquil side effects are:
Dizzy For 24 Hours Afte (42 reports)
Night Sweats (42 reports)
Makes Me Sneeze Right After Taking It (37 reports)
Diarrhea (25 reports)
Feeling Totally Stoned (24 reports)
Anaphylactic Reaction (15 reports)
Dizzy For 24 Hours After Taking Just 2 (15 reports)
Feeling Drunk Soured Words (7 reports)
Flushed (6 reports)

If you have experienced a side effect listed above, you can check a box to report it.


To view a complete list of submitted side effects, please follow the link Nyquil side effects . You can also compare Nyquil side effects or view FDA reports.

Nyquil Side Effects reported to FDA

The following Nyquil reports list potential signals of serious risks and new safety information that were identified using the FDA Adverse Event Reporting System (FAERS).
The FAERS is a database that contains information on adverse event and medication errors reports submitted to FDA by healthcare professionals (such as physicians, pharmacists, nurses and others), consumers (such as patients, family members, layers and others) and manufacturers.


The appearance of Nyquil on this list does not mean that FDA has concluded that the drug has the listed risk. It means that FDA has identified a potential safety issue, but it does not mean that FDA has identified a causal relationship between the drug and the listed risk.

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Pleural Effusion, Pyrexia, Circulatory Collapse, Musculoskeletal Pain, Abdominal Pain Upper, Fear, Emotional Distress, Anxiety
on Feb 13, 2012 Female from UNITED STATES , 24 years of age, weighting 150.0 lb, was treated with Nyquil. Directly after, patient experienced the unwanted or unexpected Nyquil side effects: pleural effusion, pyrexia, circulatory collapse, musculoskeletal pain, abdominal pain upper, fear, emotional distress, anxiety. Nyquil dosage: Unk.
Associated medications used:
  • Tylenol 1 (2 Capsules, Tid)
  • Mesalamine
  • Yasmin (Unk)
  • Pentasa (2 Gm, Qd)
  • Iron
  • Cipro (Unk)
  • Prednisone (15 Mg, Qd)
Patient was hospitalized.

Menstruation Delayed
Patient was taking Nyquil. Patient felt the following Nyquil side effects: menstruation delayed on Feb 15, 2012 from UNITED STATES Additional patient health information: Female , weighting 116.1 lb, was diagnosed with and. Nyquil dosage: N/A.
Multiple prescriptions taken:
  • Drixoral
  • Plan B One-step (1.5 Milligram;)


Menstruation Irregular
Adverse event was reported on Feb 07, 2012 by a Female taking Nyquil (Dosage: N/A) was diagnosed with and. Location: UNITED STATES , weighting 116.1 lb, After Nyquil was administered, patient encountered several Nyquil side effects: menstruation irregular.
Multiple concurrent drugs taken:

Bile Duct Stone, Muscle Spasms, Dehydration, Pain, Abdominal Discomfort, Vomiting, Gallbladder Disorder, Cholecystitis Acute, Immobile
on Jan 28, 2012 Female from UNITED STATES , 18 years of age, weighting 160.0 lb, was treated with Nyquil. Directly after, patient experienced the unwanted or unexpected Nyquil side effects: bile duct stone, muscle spasms, dehydration, pain, abdominal discomfort, vomiting, gallbladder disorder, cholecystitis acute, immobile. Nyquil dosage: Unk.
Associated medications used: Patient was hospitalized.


Insomnia, Somnolence
on Jan 27, 2012 Female from UNITED STATES , weighting 135.0 lb, was treated with Nyquil. Patient felt the following Nyquil side effects: insomnia, somnolence. Nyquil dosage: Unk.
Multiple prescriptions taken:

Feeling Abnormal, Influenza Like Illness, Joint Swelling, Convulsion, Nausea, Haematochezia, Vomiting, Insomnia, Fatigue
Patient was taking Nyquil. After Nyquil was administered, patient encountered several Nyquil side effects: feeling abnormal, influenza like illness, joint swelling, convulsion, nausea, haematochezia, vomiting, insomnia, fatigue on Jan 17, 2012 from UNITED STATES Additional patient health information: Male , 28 years of age, was diagnosed with and. Nyquil dosage: N/A.
Multiple concurrent drugs taken:
  • Humira
  • Prednisone Tab
  • Methadone Hcl
  • Prednisone Tab (Hasnt Taken For 2 Days)
  • Oxycodone Hcl (8 Times Daily As Required)
  • Keppra
  • Antioxidant
  • Promethazine


Lung Adenocarcinoma Stage Iv, Abdominal Pain
Adverse event was reported on Jan 10, 2012 by a Male taking Nyquil (Dosage: N/A) . Location: UNITED STATES , weighting 154.3 lb, Directly after, patient experienced the unwanted or unexpected Nyquil side effects: lung adenocarcinoma stage iv, abdominal pain.
Associated medications used:
  • Chantix
  • Golimumab
  • Hydrochlorothiazide
  • Golimumab
  • Naproxen (aleve)
  • Niaspan
  • Aspirin
  • Multi-vitamins
Patient was hospitalized.

Pneumonia
on Jan 13, 2012 Male from UNITED STATES , weighting 294.0 lb, was treated with Nyquil. Patient felt the following Nyquil side effects: pneumonia. Nyquil dosage: N/A.
Multiple prescriptions taken:
  • Citalopram
  • Pegasys (180mcg)
  • Gabapentin
  • Ribavirin (400mg)
  • Fluticasone Inhaler
  • Geodon
  • Metoprolol
  • Famotidine
Patient was hospitalized.

Inflammatory Bowel Disease, Rectal Abscess, Colitis Ulcerative, Blood Cholesterol Increased, Depression, Blood Triglycerides Increased
on Nov 23, 2011 Male from UNITED STATES , weighting 240.1 lb, was diagnosed with and was treated with Nyquil. After Nyquil was administered, patient encountered several Nyquil side effects: inflammatory bowel disease, rectal abscess, colitis ulcerative, blood cholesterol increased, depression, blood triglycerides increased. Nyquil dosage: N/A.
Multiple concurrent drugs taken:
  • Sulfacet-r
  • Sotret
  • Cephalexin
  • Accutane
  • Minocycline Hcl
  • Accutane
  • Accutane
  • Accutane


Toxic Epidermal Necrolysis
Patient was taking Nyquil. Directly after, patient experienced the unwanted or unexpected Nyquil side effects: toxic epidermal necrolysis on Sep 30, 2011 from UNITED STATES Additional patient health information: Female , weighting 55.34 lb, was diagnosed with and. Nyquil dosage: N/A.
Associated medications used: Patient was hospitalized.

Diarrhoea, Eye Swelling, Nasopharyngitis
Adverse event was reported on Feb 22, 2011 by a Female taking Nyquil (Dosage: N/A) . Location: UNITED STATES , weighting 180.2 lb, Patient felt the following Nyquil side effects: diarrhoea, eye swelling, nasopharyngitis.
Multiple prescriptions taken:

Dyspnoea, Urticaria
on Jul 05, 2011 Female from UNITED STATES , 44 years of age, weighting 195.0 lb, was diagnosed with and was treated with Nyquil 15 Mg Vicks. After Nyquil was administered, patient encountered several Nyquil side effects: dyspnoea, urticaria. Nyquil 15 Mg Vicks dosage: 2 Tablespoons Once Po.

Hyposmia
on May 02, 2011 Male from UNITED STATES , 36 years of age, weighting 215.0 lb, was treated with Nyquil. Directly after, patient experienced the unwanted or unexpected Nyquil side effects: hyposmia. Nyquil dosage: N/A.
Associated medications used:
  • Ascorbic Acid
  • Qtc Decongestant W/acetaminophen
  • Oxymetazoline Hcl (1 Day, 1 Dose;)
  • Multi-vitamin


Confusional State, Hyperhidrosis, Chills, Dizziness, Abdominal Pain Upper, Hypoaesthesia Facial, Feeling Cold, Foreign Body, Abdominal Distension
Patient was taking Nyquil. Patient felt the following Nyquil side effects: confusional state, hyperhidrosis, chills, dizziness, abdominal pain upper, hypoaesthesia facial, feeling cold, foreign body, abdominal distension on May 06, 2011 from UNITED STATES Additional patient health information: Female , 18 years of age, weighting 130.1 lb, . Nyquil dosage: Unk Unk, Qd.
Multiple prescriptions taken:

No Adverse Event
Adverse event was reported on Apr 04, 2011 by a Female taking Nyquil (Dosage: Unk Unk, Once) . Location: UNITED STATES , 19 years of age, weighting 167.6 lb, After Nyquil was administered, patient encountered several Nyquil side effects: no adverse event.
Multiple concurrent drugs taken: Patient was hospitalized.

Pneumonia, Electrocardiogram Qrs Complex Prolonged, Grand Mal Convulsion, Haematemesis, Haematuria, Suicide Attempt, Blood Ethanol Increased, Hypotension
on Mar 14, 2011 Male from UNITED STATES , 68 years of age, was treated with Nyquil Or Nyquil D Colf/flu Relief Alcohol 10% Original Flavor (ethano. Directly after, patient experienced the unwanted or unexpected Nyquil side effects: pneumonia, electrocardiogram qrs complex prolonged, grand mal convulsion, haematemesis, haematuria, suicide attempt, blood ethanol increased, hypotension. Nyquil Or Nyquil D Colf/flu Relief Alcohol 10% Original Flavor (ethano dosage: 180 Ml; 1 Only, Oral.
Associated medications used: Patient was hospitalized.

Blood Glucose Increased, Blood Potassium Decreased, Blood Bicarbonate Decreased, Prothrombin Time Prolonged, Suicide Attempt, Anion Gap Increased
on Mar 10, 2011 Female from UNITED STATES , 25 years of age, was treated with Nyquil Or Nyquil D Cold/flu Relief Alcohol 10%, Original Flavor(ethano. Patient felt the following Nyquil side effects: blood glucose increased, blood potassium decreased, blood bicarbonate decreased, prothrombin time prolonged, suicide attempt, anion gap increased. Nyquil Or Nyquil D Cold/flu Relief Alcohol 10%, Original Flavor(ethano dosage: As Much As 4.5 Ounces Once Only, Oral.
Multiple prescriptions taken:
  • Paroxetine Hcl
  • Synthroid
  • Thioridazine Hcl
  • Bactrim Ds
  • Clonidine
  • Omeprazole
  • Tylenol Extended Relief (paracetamol) (As Much As 67 Tablets Once Only, Oral)
Patient was hospitalized.

Ill-defined Disorder, Fall, Road Traffic Accident, Lower Respiratory Tract Infection, Dehydration, Vomiting, Weight Decreased, Rib Fracture
Patient was taking Nyquil. After Nyquil was administered, patient encountered several Nyquil side effects: ill-defined disorder, fall, road traffic accident, lower respiratory tract infection, dehydration, vomiting, weight decreased, rib fracture on Mar 09, 2011 from UNITED STATES Additional patient health information: Male , weighting 254.5 lb, was diagnosed with and. Nyquil dosage: N/A.
Multiple concurrent drugs taken:
  • Clonazpam (Daily Dose: 2 Milligram(s))
  • Androgel (Daily Dose: 7.5 Gram(s), 3 Pumps/arm)
  • Lexapro (Daily Dose: 40 Milligram(s))
  • Omeprazole (Daily Dose: 40 Milligram(s))
  • Buspar (Daily Dose: 60 Milligram(s))
Patient was hospitalized and became disabled.

Disorientation, Loss Of Consciousness, Fall, Head Injury, Nervous System Disorder, Contusion, Memory Impairment, Limb Injury, Hyperhidrosis
Adverse event was reported on Mar 08, 2011 by a Female taking Nyquil (Dosage: N/A) . Location: UNITED STATES , weighting 108.0 lb, Directly after, patient experienced the unwanted or unexpected Nyquil side effects: disorientation, loss of consciousness, fall, head injury, nervous system disorder, contusion, memory impairment, limb injury, hyperhidrosis.
Associated medications used:

Respiratory Tract Congestion
on Feb 22, 2011 Male from UNITED STATES , 36 years of age, was treated with Nyquil. Patient felt the following Nyquil side effects: respiratory tract congestion. Nyquil dosage: N/A.
Multiple prescriptions taken:

Ageusia, Anosmia
on Jan 13, 2011 Male from UNITED STATES , weighting 145.0 lb, was treated with Nyquil. After Nyquil was administered, patient encountered several Nyquil side effects: ageusia, anosmia. Nyquil dosage: N/A.
Multiple concurrent drugs taken:

Convulsion, Heart Rate Irregular, Loss Of Consciousness, Ventricular Tachycardia
Patient was taking Nyquil Cold/flu Alcohol 10% Pseudoephedrine Free, Original Flavor (par. Directly after, patient experienced the unwanted or unexpected Nyquil side effects: convulsion, heart rate irregular, loss of consciousness, ventricular tachycardia on May 20, 2010 from UNITED STATES Additional patient health information: Male , 42 years of age, . Nyquil Cold/flu Alcohol 10% Pseudoephedrine Free, Original Flavor (par dosage: Unk Dose, 1 /day For 1 Day Oral.

Dyspnoea, Pharyngeal Oedema, Urticaria
Adverse event was reported on Feb 04, 2010 by a Male taking Nyquil At Bedtime Previous Evening (Dosage: Once Bid (40 Mg) Ongoing Daily) was diagnosed with and. Location: UNITED STATES , 21 years of age, Patient felt the following Nyquil side effects: dyspnoea, pharyngeal oedema, urticaria.
Multiple prescriptions taken:

Chest Pain, Chills, Disorientation, Hypoaesthesia, Pyrexia, Rash, Skin Discolouration
on Dec 03, 2009 Male from UNITED STATES , 31 years of age, weighting 175.0 lb, was diagnosed with and was treated with Nyquil Normal. After Nyquil was administered, patient encountered several Nyquil side effects: chest pain, chills, disorientation, hypoaesthesia, pyrexia, rash, skin discolouration. Nyquil Normal dosage: Recommended, Two Pills 4-6 Hours.

Anaphylactic Shock
on Sep 15, 2009 Female from UNITED STATES , 31 years of age, weighting 214.0 lb, was diagnosed with and was treated with Nyquil Cold + Flu Vicks. Directly after, patient experienced the unwanted or unexpected Nyquil side effects: anaphylactic shock. Nyquil Cold + Flu Vicks dosage: 2 Gel Caps.

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Record and Track Your Side Effects

It is very important to keep track of all side effects and discuss them with your doctor. If you think you may have a medical emergency, call your doctor or 911 immediately.

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Most drugs have a large list of nonsevere or mild adverse effects which do not rule out continued usage. These effects depend on individual sensitivity, and can include nausea, dizziness, diarrhea, malaise, vomiting, headache, dermatitis, dry mouth, etc. Check commonly reported side effects . These can be considered a form of pseudo-allergic reaction, as not all users experience these effects; many users experience none at all.

You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.

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