Zyrtec Irritability Side Effect Reports


The following Zyrtec Irritability side effect reports were submitted by healthcare professionals and consumers.

This information will help you understand how side effects, such as Irritability, can occur, and what you can do about them.

A side effect could appear soon after you start Zyrtec or it might take time to develop.


Suicidal Ideation, Depressive Symptom, Hallucination, Irritability

This Irritability side effect was reported by a health professional from BE. A 38-year-old patient (weight:NA) experienced the following symptoms/conditions: NA. The patient was prescribed Zyrtec (tablets) (dosage: NA), which was started on Jun 19, 2007. Concurrently used drugs: NA. When starting to take Zyrtec (tablets) the consumer reported the following symptoms:
  • Suicidal Ideation
  • Depressive Symptom
  • Hallucination
  • Irritability
These side effects may potentially be related to Zyrtec (tablets).
Influenza Like Illness, Insomnia, Injection Site Erythema, Dyspnoea, Irritability, Chills, Hyperhidrosis, Injection Site Rash, Heart Rate Increased

This Irritability Zyrtec side effect was reported by a consumer or non-health professional from on May 14, 2012. A male , weighting 195.2 lb, was diagnosed with and was treated with Zyrtec. The patient presented the following health conditions:
  • Influenza Like Illness
  • Insomnia
  • Injection Site Erythema
  • Dyspnoea
  • Irritability
  • Chills
  • Hyperhidrosis
  • Injection Site Rash
  • Heart Rate Increased
. Zyrtec dosage: NA. Additional drugs used at the same time:
  • Incivek
  • Xanax
  • Dilaudid
  • Ribavirin
  • Pegasys
Blunted Affect, Insomnia, Suicidal Ideation, Disturbance In Attention, Depression, Anxiety, Irritability

This is a Zyrtec side effect report of a 6-year-old patient (weight:NA) from UNITED STATES, suffering from the following symptoms/conditions: NA, who was treated with Zyrtec (dosage:NA, start time: Nov 01, 2011), combined with:
  • Singulair (5 Mg)
, and developed a serious reaction and a Irritability side effect. The patient presented with:
  • Blunted Affect
  • Insomnia
  • Suicidal Ideation
  • Disturbance In Attention
  • Depression
  • Anxiety
  • Irritability
which developed after the beginning of treatment. This side effect report can indicate a possible existence of increased vulnerability to Zyrtec treatment in patients suffering from NA, resulting in Irritability.
Nightmare, Irritability

A 34-year-old female patient (weight: NA) from UNITED STATES with the following symptoms: NA started Zyrtec treatment (dosage: 1 Daile Po) on Apr 17, 2011. Soon after starting Zyrtec treatment, the consumer experienced several side effects, including:
  • Nightmare
  • Irritability
. Concurrently used drugs: NA. This finding indicates that some patients can be more vulnerable to developing Zyrtec side effects, such as Irritability.
Irritability, Faeces Discoloured, Increased Upper Airway Secretion, Lethargy, Dysphonia, Rash, Haematochezia, Mucous Stools, Cough

A patient from UNITED STATES was prescribed and started Zyrtec on Feb 11, 2011. Patient felt the following Zyrtec side effects: irritability, faeces discoloured, increased upper airway secretion, lethargy, dysphonia, rash, haematochezia, mucous stools, cough Additional patient health information: male , child 4 years of age, weighting 30.00 lb, The consumer reported the following symptoms: was diagnosed with and. Zyrtec dosage: 1/2 Tsp. (2.5ml) 1x/day And 2x/day If Needed. Concurrently used drugs: NA. The patient was hospitalized.
Anxiety, Irritability, Depressed Mood, Erectile Dysfunction, Libido Decreased

This report suggests a potential Zyrtec Irritability side effect(s) that can have serious consequences. A 50-year-old patient from UNITED STATES (weight:NA) was diagnosed with the following health condition(s): hypersensitivity and used Zyrtec (dosage: NA) starting Dec 15, 2010. Soon after starting Zyrtec the patient began experiencing various side effects, including:
  • Anxiety
  • Irritability
  • Depressed Mood
  • Erectile Dysfunction
  • Libido Decreased
Drugs used concurrently:NA. Although Zyrtec demonstrated significant improvements in a number of clinically relevant cases, troublesome symptoms, such as Irritability, may still occur.
Irritability, Mood Swings, Self-injurious Ideation, Aggression

An adverse event was reported by a physician on Jan 12, 2011 by a Female taking Zyrtec (dosage: NA) . Location: UNITED STATES , 31 years of age, weighting 228.0 lb, patient began experiencing various side effects, including: Directly after treatment started, patient experienced the unwanted or unexpected Zyrtec side effects: irritability, mood swings, self-injurious ideation, aggression. Additional medications/treatments:
Associated medications used:
  • Singulair
  • Benadryl
  • Sudafed 12 Hour
  • Iron
  • Mucinex
  • Zantac
  • Flonase
  • Xopenex
Arthralgia, Fatigue, Irritability, Joint Stiffness, Mood Swings, Musculoskeletal Stiffness, Pain In Extremity, Pruritus

This Irritability problem was reported by a consumer or non-health professional from UNITED STATES. A 40-year-old female patient (weight: NA) was diagnosed with the following medical condition(s): infection parasitic,pruritus,skin infection.On Nov 02, 2007 a consumer started treatment with Zyrtec (dosage: 10 Mg Then 5 Mg Daily Then 2 Days Po). The following drugs/medications were being taken at the same time: NA. When commencing Zyrtec, the patient experienced the following unwanted symptoms /side effects:
  • Arthralgia
  • Fatigue
  • Irritability
  • Joint Stiffness
  • Mood Swings
  • Musculoskeletal Stiffness
  • Pain In Extremity
  • Pruritus
Although all drugs are carefully tested before they are licensed for use, they carry potential side effect risks. Some side effects, such as Irritability, may become evident only after a product is in use by the general population.
Abnormal Behaviour, Aggression, Crying, Epistaxis, Headache, Increased Appetite, Irritability, Mood Swings, Nightmare

This is a Zyrtec side effect report of a 5-year-old patient (weight: NA) from UNITED STATES. The patient developed the following symptoms/conditions: hypersensitivity and was treated with Zyrtec (dosage: 2.5 Ml-5ml Every @4 Hours Po) starting NS. Concurrently used drugs: NA. Soon after that, the consumer experienced the following of symptoms:
  • Abnormal Behaviour
  • Aggression
  • Crying
  • Epistaxis
  • Headache
  • Increased Appetite
  • Irritability
  • Mood Swings
  • Nightmare
This opens a possibility that Zyrtec could cause Irritability and that some patients may be more susceptible.
Aggression, Heart Rate Increased, Irritability, Mood Swings, Nightmare, Palpitations, Personality Change

This Irritability side effect was reported by a consumer or non-health professional from UNITED STATES on Oct 20, 2009. A patient from UNITED STATES , child 6 years of age, weighting 55.00 lb, was diagnosed with and was treated with Zyrtec. Directly after treatment started, patient experienced the unwanted or unexpected Zyrtec side effects: aggression, heart rate increased, irritability, mood swings, nightmare, palpitations, personality change. Zyrtec dosage: 1tsp 1 Time A Day. These side effects may potentially be related to Zyrtec.
Abnormal Dreams, Disturbance In Attention, Irritability

This Irritability side effect was reported by a consumer or non-health professional from UNITED STATES. A 27-year-old patient (weight:NA) experienced the following symptoms/conditions: multiple allergies. The patient was prescribed Zyrtec (dosage: 1 10mg Tablet Daily Po), which was started on NS. Concurrently used drugs: NA. When starting to take Zyrtec the consumer reported the following symptoms:
  • Abnormal Dreams
  • Disturbance In Attention
  • Irritability
These side effects may potentially be related to Zyrtec.
Amnesia, Anger, Confusional State, Depression, Fear, Feeling Abnormal, Flushing, Insomnia, Irritability

This Irritability Zyrtec side effect was reported by a consumer or non-health professional from UNITED STATES on Apr 17, 2009. A Female , 56 years of age, weighting 140.0 lb, was diagnosed with and was treated with Zyrtec. The patient presented the following health conditions:
  • Amnesia
  • Anger
  • Confusional State
  • Depression
  • Fear
  • Feeling Abnormal
  • Flushing
  • Insomnia
  • Irritability
. Zyrtec dosage: 1 Tablet Daily. Additional drugs used at the same time: NA.
Aggression, Agitation, Irritability, Mood Altered, Mood Swings

This is a Zyrtec side effect report of a 13-year-old patient (weight:NA) from UNITED STATES, suffering from the following symptoms/conditions: cough, who was treated with Zyrtec (dosage:1 Pill 1x Po, start time: Mar 11, 2009), combined with:
  • Zicam (1 Tablespoon 1x Po)
, and developed a serious reaction and a Irritability side effect. The patient presented with:
  • Aggression
  • Agitation
  • Irritability
  • Mood Altered
  • Mood Swings
which developed after the beginning of treatment. This side effect report can indicate a possible existence of increased vulnerability to Zyrtec treatment in patients suffering from cough, resulting in Irritability.
Anger, Anxiety, Depression, Irritability, Suicidal Ideation

A 38-year-old female patient (weight: NA) from UNITED STATES with the following symptoms: urticaria physical started Zyrtec treatment (dosage: NA) on NS. Soon after starting Zyrtec treatment, the consumer experienced several side effects, including:
  • Anger
  • Anxiety
  • Depression
  • Irritability
  • Suicidal Ideation
. Concurrently used drugs: NA. This finding indicates that some patients can be more vulnerable to developing Zyrtec side effects, such as Irritability.
Abdominal Pain Upper, Aggression, Anger, Depression, Irritability, Marital Problem, Mental Disorder

A patient from UNITED STATES was prescribed and started Zyrtec on Sep 15, 2008. After Zyrtec was administered, patient encountered several Zyrtec side effects: abdominal pain upper, aggression, anger, depression, irritability, marital problem, mental disorder Additional patient health information: male , 51 years of age, weighting 213.0 lb, The consumer reported the following symptoms: was diagnosed with and. Zyrtec dosage: 10mg Once A Day Po. Concurrently used drugs: NA.
Abnormal Behaviour, Aggression, Emotional Disorder, Irritability, Mood Swings, Nightmare, Pruritus, Sleep Disorder, Suicidal Ideation

This report suggests a potential Zyrtec Irritability side effect(s) that can have serious consequences. A female patient from UNITED STATES (weight:NA) was diagnosed with the following health condition(s): hypersensitivity and used Zyrtec (dosage: 1/2 Tsp Nightly Oral) starting Oct 01, 2007. Soon after starting Zyrtec the patient began experiencing various side effects, including:
  • Abnormal Behaviour
  • Aggression
  • Emotional Disorder
  • Irritability
  • Mood Swings
  • Nightmare
  • Pruritus
  • Sleep Disorder
  • Suicidal Ideation
Drugs used concurrently:NA. Although Zyrtec demonstrated significant improvements in a number of clinically relevant cases, troublesome symptoms, such as Irritability, may still occur.
Abnormal Behaviour, Aggression, Anger, Irritability, Lethargy, Mood Swings, Oppositional Defiant Disorder, Sleep Disorder

An adverse event was reported by a consumer or non-health professional on May 13, 2008 by a male taking Zyrtec (dosage: 2.5 Mg 1x Daily Po) was diagnosed with and. Location: UNITED STATES , weighting 35.00 lb, patient began experiencing various side effects, including: Patient felt the following Zyrtec side effects: abnormal behaviour, aggression, anger, irritability, lethargy, mood swings, oppositional defiant disorder, sleep disorder. Additional medications/treatments:
Abnormal Behaviour, Aggression, Anger, Burning Sensation, Depression, Insomnia, Irritability, Oppositional Defiant Disorder

This Irritability problem was reported by a consumer or non-health professional from UNITED STATES. A 15-year-old patient (weight: NA) was diagnosed with the following medical condition(s): hypersensitivity.On NS a consumer started treatment with Zyrtec (dosage: 10 Mg Tablet Daily Po). The following drugs/medications were being taken at the same time: NA. When commencing Zyrtec, the patient experienced the following unwanted symptoms /side effects:
  • Abnormal Behaviour
  • Aggression
  • Anger
  • Burning Sensation
  • Depression
  • Insomnia
  • Irritability
  • Oppositional Defiant Disorder
Although all drugs are carefully tested before they are licensed for use, they carry potential side effect risks. Some side effects, such as Irritability, may become evident only after a product is in use by the general population.
Depressive Symptom, Hallucination, Irritability, Suicidal Ideation

This is a Zyrtec side effect report of a 38-year-old patient (weight: NA) from JAPAN. The patient developed the following symptoms/conditions: dermatitis atopic and was treated with Zyrtec (dosage: Text:10mg-freq:daily) starting Jun 19, 2007. Concurrently used drugs:
  • Suplatast Tosilate (Text:300mg-freq:daily)
  • Mequitazine
Soon after that, the consumer experienced the following of symptoms:
  • Depressive Symptom
  • Hallucination
  • Irritability
  • Suicidal Ideation
This opens a possibility that Zyrtec could cause Irritability and that some patients may be more susceptible.
Confusional State, Dizziness, Irritability, Restlessness

This Irritability side effect was reported by a physician from UNITED STATES on Apr 04, 2007. A patient from UNITED STATES , 68 years of age, was diagnosed with and was treated with Zyrtec. Patient felt the following Zyrtec side effects: confusional state, dizziness, irritability, restlessness. Zyrtec dosage: 10 Mg (10 Mg,1 In 1 D),oral.
Multiple prescriptions taken:
  • Lisinopril
  • Prilosec
  • Plavix
  • Niacin
  • Acetylsalicylic Acid Srt
  • Folic Acid
  • Zetia
  • Toprol-xl
These side effects may potentially be related to Zyrtec.

DISCLAIMER: ALL DATA PROVIDED AS-IS, refer to terms of use for additional information.

Zyrtec Irritability Causes and Reviews


For most adults, moderate alcohol use is probably not harmful. However, about 18 million adult Americans have an alcohol use disorder (AUD). This means that their drinking causes distress and harm. It includes alcoholism and alcohol abuse.

Alcoholism, or alcohol dependence, is a disease that causes

  • Craving - a strong need to drink
  • Loss of control - not being able to stop drinking once you've started
  • Physical dependence - withdrawal symptoms
  • Tolerance - the need to drink more alcohol to feel the same effect

With alcohol abuse, you are not physically dependent, but you still have a serious problem. The drinking may cause problems at home, work, or school. It may cause you to put yourself in dangerous situations, or lead to legal or social problems.

Another common problem is binge drinking. It is drinking about five or more drinks in two hours for men. For women, it is about four or more drinks in two hours.

Too much alcohol is dangerous. Heavy drinking can increase the risk of certain cancers. It can cause damage to the liver, brain, and other organs. Drinking during pregnancy can harm your baby. Alcohol also increases the risk of death from car crashes, injuries, homicide, and suicide.

You may have an AUD if you can answer yes to two or more of these questions:

In the past year, have you

  • Ended up drinking more or for a longer time than you had planned to?
  • Wanted to cut down or stop drinking, or tried to, but couldn't?
  • Spent a lot of your time drinking, or recovering from drinking?
  • Felt a strong need to drink?
  • Found that drinking - or being sick from drinking - often interfered with your family life, job, or school?
  • Kept drinking even though it was causing trouble with your family or friends?
  • Given up or cut back on activities that you enjoyed just so you could drink?
  • Gotten into dangerous situations while drinking or after drinking? Some examples are driving drunk and having unsafe sex.
  • Kept drinking even though it was making you feel depressed or anxious? Or when it was adding to another health problem?
  • Had to drink more and more to feel the effects of the alcohol?
  • Had withdrawal symptoms when the alcohol was wearing off? They include trouble sleeping, shakiness, Irritability, anxiety, depression, restlessness, nausea, and sweating. In severe cases, you could have a fever, seizures, or hallucinations.

If you have any of these symptoms, your drinking may already be a cause for concern. The more symptoms you have, the more serious the problem is. If you think you might have an AUD, see your health care provider for an evaluation. Your provider can help make a treatment plan, prescribe medicines, and if needed, give you treatment referrals.

NIH: National Institute on Alcohol Abuse and Alcoholism


Zyrtec Irritability Reviews

Fri, 21 May 2010

I took one dose and experienced a bout of pancreatitis. I suffer from chronic pancreatitis and know what most of my "triggers" are.....never thought a simple allergy medication would cause such a problem, I think I would rather suffer allergies than risk pancreatitis.

Sat, 05 Nov 2011

Started on Zyrtec on the suggestion of my dermatologist for treatment of hives. Rash that resulted from the Zyrtec a MILLION times worse than the original hives. Had the same reaction to Seldane.

Tue, 09 Feb 2010

I have Type 2 Diabetes, when taking my level in the morning I noticed my level was elevated, and the only thing I had ingested was a Zyrtec pill about 2 hours prior? Could the pill be the cause?

Wed, 03 Dec 2008
Does Zyrtec inrease blood sugar levels? I have been taking 10m a day for 10 days and have notices symptoms of high blood sugar, when tested it was in the high 100's. Has anyone heard of this side effect?
Sat, 13 Aug 2011
I have had and am having a bad reaction to Zyrtec. My eyes are inflamed and my throat is sore. Lips are swollen. My tongue is white. I will be forced to go to the Emergency at the hospital.
Sun, 28 Mar 2010
I took Zyrtec for a week and while it does solve my allergy issues, it makes me a raving lunatic. Severe aggression, mood swings, and nightmares are the norm for me n this medicine. I would not recommend it if you are taking any anti anxiety or anti depressants.
Mon, 23 May 2011
bad gastritis or abdominal pain; had to get into tub with hot shower on my belly;never had a worse experience or pain; thought I was going to die; malaise; moderate ear pain
DISCLAIMER: ALL DATA PROVIDED AS-IS, refer to terms of use for additional information.

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Top Zyrtec Side Effects

Pruritus (212)
Pain (145)
Fatigue (145)
Dizziness (140)
Somnolence (133)
Urticaria (132)
Dyspnoea (132)
Nausea (116)
Hypersensitivity (114)
Headache (113)
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Depression (105)
Feeling Abnormal (105)
Rash (103)
Anxiety (96)
Off Label Use (94)
Convulsion (93)
Product Quality Issue (92)
Condition Aggravated (80)
Abnormal Behaviour (79)
Loss Of Consciousness (43)
Aggression (43)
Overdose (41)
Withdrawal Syndrome (39)
Injury (39)
Pulmonary Embolism (38)
Irritability (36)
Vomiting (36)
Pyrexia (36)
Abdominal Pain Upper (35)
Deep Vein Thrombosis (34)
Hallucination (34)
Fall (34)
Asthma (33)
Diarrhoea (31)
Palpitations (30)
Malaise (30)
Suicidal Ideation (29)
Blood Pressure Increased (28)
Abdominal Pain (28)
Disturbance In Attention (27)
Cough (27)
Pain In Extremity (27)
Contusion (26)
Dry Mouth (26)
Chest Discomfort (26)
Anger (25)
Cholecystitis Chronic (25)
Weight Increased (25)
Back Pain (24)

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