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Loratadine Side Effects

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Common Loratadine Side Effects


The most commonly reported Loratadine side effects (click to view or check a box to report):

Dizziness (40)
Convulsion (37)
Accidental Overdose (36)
Dyspnoea (34)
Somnolence (31)
Headache (28)
Vomiting (23)
Hypersensitivity (23)
Malaise (22)
Nausea (22)
Urticaria (21)
Pain (21)
Pruritus (20)
Loss Of Consciousness (20)
Death (19)
Insomnia (19)
Syncope (19)
Palpitations (19)
Swelling Face (17)
Anxiety (17)

➢ More



If you or someone in your family has experienced a serious side effect to a health product, you are encouraged to report the experience to your health care professional (e.g. physician, pharmacist). You could also complete a copy of the side effect reporting form or report your side effect to FDA.

Loratadine Side Effects Reported to FDA



Loratadine Side Effect Report#9236833
Hallucination, Visual, Eye Pruritus, Eye Discharge, Insomnia, Hypopnoea
This is a report of a 62-year-old female patient (weight: NA) from US, suffering from the following health symptoms/conditions: seasonal allergy, who was treated with Loratadine And Pseudoephedrine Sulfate (dosage: One Tablet Daily, start time:
Mar 30, 2013), combined with:
  • Vitamin E /00110501/ (Unk)
  • Vitamin D /00107901/ (Unk)
and developed a serious reaction and side effect(s): Hallucination, Visual, Eye Pruritus, Eye Discharge, Insomnia, Hypopnoea after the beginning of treatment. This case can indicate the possible existence of increased vulnerability to Loratadine And Pseudoephedrine Sulfate treatment in female patients, resulting in Hallucination, Visual side effect.
Loratadine Side Effect Report#9218567
White Blood Cell Count Increased, Haemoglobin Decreased, Neutrophil Count Increased, Fibrin D Dimer Increased, Alanine Aminotransferase Increased, Blood Alkaline Phosphatase Increased, Pyrexia, Blood Ph Decreased, Pco2 Decreased
This report suggests a potential Loratadine White Blood Cell Count Increased side effect(s) that can have serious consequences. A 69-year-old male patient (weight: NA) from GB was diagnosed with the following symptoms/conditions: NA and used Loratadine (dosage: NA) starting
Jan 07, 2013. After starting Loratadine the patient began experiencing various side effects, including: White Blood Cell Count Increased, Haemoglobin Decreased, Neutrophil Count Increased, Fibrin D Dimer Increased, Alanine Aminotransferase Increased, Blood Alkaline Phosphatase Increased, Pyrexia, Blood Ph Decreased, Pco2 DecreasedAdditional drugs used concurrently:
  • Simvastatin
  • Zoladex
  • Docetaxel (Also Received On 07-jan-2013)
  • Zoledronic Acid
Although Loratadine demonstrated significant improvements in a number of clinically relevant cases, troublesome symptoms, such as White Blood Cell Count Increased, may still occur.
Loratadine Side Effect Report#9208305
Urticaria, Anaphylactic Reaction
This Urticaria problem was reported by a physician from US. A 34-year-old female patient (weight: NA) was diagnosed with the following symptoms/conditions: idiopathic urticaria. On
Aug 02, 2011 this consumer started treatment with Loratadine (dosage: NA). The following drugs were being taken at the same time:
  • Lo/ovral (1 Tablet)
  • Prednisone
  • Benadryl
  • Omalizumab (2 Injections Per Dose, Last Dose Prior To Sae: 20/dec/2011)
When using Loratadine, the patient experienced the following unwanted symptoms/side effects: Urticaria, Anaphylactic ReactionAlthough all drugs are carefully tested before they are licensed for use, they carry side effect risks. Some side effects, such as Urticaria, may become evident only after a product is in use by the general population.
Loratadine Side Effect Report#9204877
Anaphylactic Reaction
This Anaphylactic Reaction side effect was reported by a pharmacist from US. A 64-year-old male patient (weight:NA) experienced the following symptoms/conditions: NA.The patient was prescribed Loratadine (drug dosage: NA), which was initiated on NS. Concurrently used drugs: NA..After starting to take Loratadine the consumer reported adverse symptoms, such as: Anaphylactic ReactionThese side effects may potentially be related to Loratadine.
Loratadine Side Effect Report#9184627
Blood Glucose Increased
This is a report of a 7-year-old female patient (weight: NA) from US, suffering from the following health symptoms/conditions: NA, who was treated with Loratadine Syrup (loratadine Oral Solution Usp) 5mg/5ml (dosage: NA, start time:
Mar 11, 2013), combined with:
  • Insulin
and developed a serious reaction and side effect(s): Blood Glucose Increased after the beginning of treatment. This case can indicate the possible existence of increased vulnerability to Loratadine Syrup (loratadine Oral Solution Usp) 5mg/5ml treatment in female patients, resulting in Blood Glucose Increased side effect.
Loratadine Side Effect Report#9181770
Partial Seizures
This report suggests a potential Loratadine 10 Mg 612 Partial Seizures side effect(s) that can have serious consequences. A 66-year-old female patient (weight: NA) from US was diagnosed with the following symptoms/conditions: hypersensitivity and used Loratadine 10 Mg 612 (dosage: 10 Mg, Qd) starting 1982. After starting Loratadine 10 Mg 612 the patient began experiencing various side effects, including: Partial SeizuresAdditional drugs used concurrently: NA. Although Loratadine 10 Mg 612 demonstrated significant improvements in a number of clinically relevant cases, troublesome symptoms, such as Partial Seizures, may still occur.
Loratadine Side Effect Report#9175257
Dyspnoea
This Dyspnoea problem was reported by a pharmacist from JP. A 68-year-old male patient (weight: NA) was diagnosed with the following symptoms/conditions: seasonal allergy. On
Mar 09, 2013 this consumer started treatment with Loratadine Pfizer (dosage: 10 Mg, Daily). The following drugs were being taken at the same time:
  • Nasonex (2 Sprays)
  • Patanol (Unk)
When using Loratadine Pfizer, the patient experienced the following unwanted symptoms/side effects: DyspnoeaAlthough all drugs are carefully tested before they are licensed for use, they carry side effect risks. Some side effects, such as Dyspnoea, may become evident only after a product is in use by the general population.
Loratadine Side Effect Report#9164629
Pain, Hypersensitivity, Ear Swelling, Swelling Face, Pruritus
This Pain side effect was reported by a health professional from GB. A 76-year-old female patient (weight:NA) experienced the following symptoms/conditions: pruritus,lice infestation.The patient was prescribed Loratadine (drug dosage: Unk), which was initiated on
Jan 04, 2013. Concurrently used drugs:
  • Hedrin (Unk)
.After starting to take Loratadine the consumer reported adverse symptoms, such as: Pain, Hypersensitivity, Ear Swelling, Swelling Face, PruritusThese side effects may potentially be related to Loratadine. The patient was hospitalized.
Loratadine Side Effect Report#9153005
Palpitations, Chest Discomfort
This is a report of a 52-year-old female patient (weight: NA) from US, suffering from the following health symptoms/conditions: seasonal allergy,upper-airway cough syndrome, who was treated with Loratadine (dosage: 1tablet Daily Po, start time:
Feb 21, 2013), combined with: NA. and developed a serious reaction and side effect(s): Palpitations, Chest Discomfort after the beginning of treatment. This case can indicate the possible existence of increased vulnerability to Loratadine treatment in female patients, resulting in Palpitations side effect.
Loratadine Side Effect Report#9145987
Completed Suicide
This report suggests a potential Loratadine Completed Suicide side effect(s) that can have serious consequences. A 31-year-old female patient (weight: NA) from US was diagnosed with the following symptoms/conditions: NA and used Loratadine (dosage: NA) starting NS. After starting Loratadine the patient began experiencing various side effects, including: Completed SuicideAdditional drugs used concurrently:
  • Cyclobenzaprine
  • Quetiapine
  • Acetaminophrn\butalbital\caffeine\codeine Phosphate.
  • Acetaminophen W / Hydrocodone
  • Temazepam
  • Acetaminophen W / Oxycodone (not Specified)
Although Loratadine demonstrated significant improvements in a number of clinically relevant cases, troublesome symptoms, such as Completed Suicide, may still occur.
Loratadine Side Effect Report#9129699
Vomiting, Decreased Appetite, Weight Decreased, Constipation, Viral Infection, Abdominal Pain, Nasal Congestion, Headache, Urine Analysis Abnormal
This Vomiting problem was reported by a health professional from US. A 8-year-old male patient (weight: NA) was diagnosed with the following symptoms/conditions: NA. On
Oct 08, 2012 this consumer started treatment with Loratadine (dosage: NA). The following drugs were being taken at the same time: NA. When using Loratadine, the patient experienced the following unwanted symptoms/side effects: Vomiting, Decreased Appetite, Weight Decreased, Constipation, Viral Infection, Abdominal Pain, Nasal Congestion, Headache, Urine Analysis AbnormalThe patient was hospitalized.Although all drugs are carefully tested before they are licensed for use, they carry side effect risks. Some side effects, such as Vomiting, may become evident only after a product is in use by the general population.
Loratadine Side Effect Report#9123398
Cardiac Arrest, Respiratory Arrest
This Cardiac Arrest side effect was reported by a physician from US. A 49-year-old female patient (weight:NA) experienced the following symptoms/conditions: NA.The patient was prescribed Loratadine (drug dosage: Df Respiratory (inhalation)), which was initiated on NS. Concurrently used drugs:
  • Acetaminophen/oxycodone (Df, Respiratory (inhalation))
  • Hydrocodone (Df Respiratory (inhalation))
  • Gabapentin (Df Respiratory (inhalation))
.After starting to take Loratadine the consumer reported adverse symptoms, such as: Cardiac Arrest, Respiratory ArrestThese side effects may potentially be related to Loratadine.
Loratadine Side Effect Report#9114320
Cold Sweat, Nausea, Somnolence, Dizziness, Tremor, Product Outer Packaging Issue, Product Label Issue, Product Substitution Issue
This is a report of a 43-year-old female patient (weight: NA) from US, suffering from the following health symptoms/conditions: nasopharyngitis, who was treated with Loratadine And Pseudoephedrine (dosage: NA, start time:
Feb 15, 2013), combined with: NA. and developed a serious reaction and side effect(s): Cold Sweat, Nausea, Somnolence, Dizziness, Tremor, Product Outer Packaging Issue, Product Label Issue, Product Substitution Issue after the beginning of treatment. This case can indicate the possible existence of increased vulnerability to Loratadine And Pseudoephedrine treatment in female patients, resulting in Cold Sweat side effect.
Loratadine Side Effect Report#9079516
Hypersensitivity, Ear Swelling, Swelling Face, Pruritus, Pain
This report suggests a potential Loratadine Hypersensitivity side effect(s) that can have serious consequences. A 76-year-old female patient (weight: NA) from GB was diagnosed with the following symptoms/conditions: pruritus,lice infestation and used Loratadine (dosage: 10 Mg, Unk) starting
Jan 04, 2013. After starting Loratadine the patient began experiencing various side effects, including: Hypersensitivity, Ear Swelling, Swelling Face, Pruritus, PainAdditional drugs used concurrently:
  • Hedrin (Unk)
The patient was hospitalized. Although Loratadine demonstrated significant improvements in a number of clinically relevant cases, troublesome symptoms, such as Hypersensitivity, may still occur.
Loratadine Side Effect Report#9069529
Atrial Fibrillation, Heart Rate Irregular, Syncope, Head Injury, Injury, Contusion, Concussion
This Atrial Fibrillation problem was reported by a consumer or non-health professional from US. A 88-year-old female patient (weight: NA) was diagnosed with the following symptoms/conditions: hypersensitivity. On
Aug 13, 2012 this consumer started treatment with Loratadine (dosage: 10 Mg, Prn). The following drugs were being taken at the same time:
  • Sotalol (Unk Mg, Unk)
  • Xarelto (Unk Df, Unk)
When using Loratadine, the patient experienced the following unwanted symptoms/side effects: Atrial Fibrillation, Heart Rate Irregular, Syncope, Head Injury, Injury, Contusion, ConcussionThe patient was hospitalized.Although all drugs are carefully tested before they are licensed for use, they carry side effect risks. Some side effects, such as Atrial Fibrillation, may become evident only after a product is in use by the general population.
Loratadine Side Effect Report#9068670
Agitation, Insomnia
This Agitation side effect was reported by a consumer or non-health professional from US. A 72-year-old female patient (weight:NA) experienced the following symptoms/conditions: multiple allergies.The patient was prescribed Loratadine (drug dosage: 1 Tablet 1 X A Day At 3:00a Po), which was initiated on
Feb 08, 2013. Concurrently used drugs: NA..After starting to take Loratadine the consumer reported adverse symptoms, such as: Agitation, InsomniaThese side effects may potentially be related to Loratadine.
Loratadine Side Effect Report#9061870
Hypersensitivity, Ear Swelling, Pruritus, Swelling Face, Pain
This is a report of a 76-year-old female patient (weight: NA) from GB, suffering from the following health symptoms/conditions: pruritus,lice infestation, who was treated with Loratadine (dosage: 10 Mg, start time:
Jan 04, 2013), combined with:
  • Dimethicone (Unk)
and developed a serious reaction and side effect(s): Hypersensitivity, Ear Swelling, Pruritus, Swelling Face, Pain after the beginning of treatment. This case can indicate the possible existence of increased vulnerability to Loratadine treatment in female patients, resulting in Hypersensitivity side effect. The patient was hospitalized.
Loratadine Side Effect Report#9056305
Hypersensitivity, Ear Swelling, Swelling Face, Pruritus, Pain
This report suggests a potential Loratadine Hypersensitivity side effect(s) that can have serious consequences. A 76-year-old female patient (weight: NA) from GB was diagnosed with the following symptoms/conditions: pruritus,lice infestation and used Loratadine (dosage: NA) starting
Jan 04, 2013. After starting Loratadine the patient began experiencing various side effects, including: Hypersensitivity, Ear Swelling, Swelling Face, Pruritus, PainAdditional drugs used concurrently:
  • Hedrin
The patient was hospitalized. Although Loratadine demonstrated significant improvements in a number of clinically relevant cases, troublesome symptoms, such as Hypersensitivity, may still occur.
Loratadine Side Effect Report#9050354
Hypersensitivity, Pruritus, Swelling Face, Ear Swelling, Pain
This Hypersensitivity problem was reported by a health professional from GB. A 76-year-old female patient (weight: NA) was diagnosed with the following symptoms/conditions: pruritus,lice infestation. On
Jan 04, 2013 this consumer started treatment with Loratadine (dosage: NA). The following drugs were being taken at the same time:
  • Hedrin
When using Loratadine, the patient experienced the following unwanted symptoms/side effects: Hypersensitivity, Pruritus, Swelling Face, Ear Swelling, PainThe patient was hospitalized.Although all drugs are carefully tested before they are licensed for use, they carry side effect risks. Some side effects, such as Hypersensitivity, may become evident only after a product is in use by the general population.
Loratadine Side Effect Report#9031013
Hypersensitivity, Swelling Face, Ear Swelling, Pain, Pruritus
This Hypersensitivity side effect was reported by a health professional from GB. A 76-year-old female patient (weight:NA) experienced the following symptoms/conditions: pruritus,lice infestation.The patient was prescribed Loratadine (drug dosage: 10 Mg, Unk), which was initiated on
Jan 04, 2013. Concurrently used drugs:
  • Hedrin (Unk Ukn, Unk)
.After starting to take Loratadine the consumer reported adverse symptoms, such as: Hypersensitivity, Swelling Face, Ear Swelling, Pain, PruritusThese side effects may potentially be related to Loratadine. The patient was hospitalized.
Loratadine Side Effect Report#9001245
Completed Suicide
This is a report of a 31-year-old female patient (weight: NA) from US, suffering from the following health symptoms/conditions: NA, who was treated with Loratadine (dosage: Unk, start time: NS), combined with:
  • Cyclobenzaprine (Unk)
  • Quetiapine (Unk)
  • Butalbital/caffeine/codeine Phosphate/paracetamol (Unk)
  • Acetaminophen W/hydrocodone Bitartrate (Unk)
  • Temazepam (Unk)
  • Acetaminophen W/oxycodone (Unk)
and developed a serious reaction and side effect(s): Completed Suicide after the beginning of treatment. This case can indicate the possible existence of increased vulnerability to Loratadine treatment in female patients, resulting in Completed Suicide side effect.
Loratadine Side Effect Report#8996504
Suicide Attempt, Sopor
This report suggests a potential Loratadine Suicide Attempt side effect(s) that can have serious consequences. A 46-year-old female patient (weight: NA) from IT was diagnosed with the following symptoms/conditions: suicide attempt and used Loratadine (dosage: 25 Posological Units, Qd) starting
Oct 08, 2012. After starting Loratadine the patient began experiencing various side effects, including: Suicide Attempt, SoporAdditional drugs used concurrently:
  • En (20 Ml,qd)
  • Spiriva (Unk)
Although Loratadine demonstrated significant improvements in a number of clinically relevant cases, troublesome symptoms, such as Suicide Attempt, may still occur.
Loratadine Side Effect Report#8988055
Ventricular Extrasystoles, Supraventricular Extrasystoles, Arrhythmia, Dyspnoea, Chest Pain, Cough
This Ventricular Extrasystoles problem was reported by a consumer or non-health professional from US. A 36-year-old female patient (weight: NA) was diagnosed with the following symptoms/conditions: seasonal allergy,gastrooesophageal reflux disease. On 2011 this consumer started treatment with Loratadine 10 Mg 612 (dosage: 10 Mg, Qd). The following drugs were being taken at the same time:
  • Dexilant (Unk, Unk)
When using Loratadine 10 Mg 612, the patient experienced the following unwanted symptoms/side effects: Ventricular Extrasystoles, Supraventricular Extrasystoles, Arrhythmia, Dyspnoea, Chest Pain, CoughAlthough all drugs are carefully tested before they are licensed for use, they carry side effect risks. Some side effects, such as Ventricular Extrasystoles, may become evident only after a product is in use by the general population.
Loratadine Side Effect Report#8978350
Dystonia
This Dystonia side effect was reported by a health professional from CN. A 9-year-old male patient (weight:NA) experienced the following symptoms/conditions: hypersensitivity.The patient was prescribed Loratadine (drug dosage: NA), which was initiated on
Apr 17, 2011. Concurrently used drugs: NA..After starting to take Loratadine the consumer reported adverse symptoms, such as: DystoniaThese side effects may potentially be related to Loratadine. The patient was hospitalized.
Loratadine Side Effect Report#8975059
Diarrhoea, Hepatic Enzyme Abnormal, Vomiting, Decreased Appetite, Weight Decreased
This is a report of a 65-year-old female patient (weight: NA) from US, suffering from the following health symptoms/conditions: mycotic allergy, who was treated with Loratadine 10 Mg 612 (dosage: 10 Mg, Qd, start time:
Sep 24, 2012), combined with: NA. and developed a serious reaction and side effect(s): Diarrhoea, Hepatic Enzyme Abnormal, Vomiting, Decreased Appetite, Weight Decreased after the beginning of treatment. This case can indicate the possible existence of increased vulnerability to Loratadine 10 Mg 612 treatment in female patients, resulting in Diarrhoea side effect. The patient was hospitalized.


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The appearance of Loratadine 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 found a causal relationship between the drug and the listed risk.

What are common Loratadine Side Effects for Women?

Women Side EffectsReports
Dizziness 28
Dyspnoea 22
Hypersensitivity 21
Accidental Overdose 18
Headache 17
Malaise 17
Nausea 17
Pruritus 17
Syncope 16
Urticaria 15

What are common Loratadine Side Effects for Men?

Men Side EffectsReports
Convulsion 20
Somnolence 16
Vomiting 15
Accidental Overdose 12
Dyspnoea 12
Dizziness 11
Headache 11
Overdose 10
Abdominal Pain Upper 9
Autoimmune Hepatitis 9

Track Your Side Effects

Note Your Observations

It is really important to keep track of your health symptoms, right from the time you start a new medicine. You can do it any way you prefer: in a notebook, in a computer file or using our online tool. You should also note down any other medicines you are taking at the same time, because there could be an interaction between these medicines.

Why Your Notes are Important

Your notes could be helpful in several ways:

  • You can use them to remind you of details that may alert your health care professional(s) to a problem
  • You will have a record to refer to in the future, in case you are ever prescribed the same medicine again

  • Log Form

    You can use the following log form to write down important information, like the date and time you experienced a side effect and your symptoms, how strong the symptoms were, and any other medicines you were using.

    Medicine Name and Dosage:
    Side Effects Scale Date & Time Other Medicine(s) or Treatment(s)
    Scale: 1 = very mild to 10 = very bad

    Side effects reports are analyzed to discover potential health product safety signals. Some important reactions may take an extremely long time to develop or occur infrequently. Continued monitoring of adverse reactions is thus essential to maintain a comprehensive safety and effectiveness profile of health products.

    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.

    Loratadine reports list potential signals of serious risks and new safety information that were identified using the FDA Adverse Event Reporting System (FAERS).
    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.

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