Common Blonanserin Side Effects


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

Malaise (2)
Decubitus Ulcer (2)
Neuroleptic Malignant Syndrome (2)
Extrapyramidal Disorder (2)
Somnolence (2)
Psychiatric Symptom (2)
Neurological Symptom (2)
Hallucination, Auditory (1)
Erythema (1)
Fall (1)
Acne (1)
Weight Increased (1)
Bradykinesia (1)
Liver Disorder (1)
Lactation Disorder (1)
Hyperphagia (1)
Menstruation Irregular (1)
Overdose (1)
Rhabdomyolysis (1)
Tubulointerstitial Nephritis (1)

➢ 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.

Blonanserin Side Effects Reported to FDA



Blonanserin Side Effect Report#8450015-1
Dehydration, Eosinophil Count Increased, Tubulointerstitial Nephritis, White Blood Cell Count Increased, Diarrhoea
This is a report of a male patient (weight: NA) from Japan, suffering from the following health symptoms/conditions: NA, who was treated with Blonanserin (dosage: 24 Mg, Unk, start time:
Mar 02, 2012), combined with:
  • Clozaril (100 Mg, Unk)
  • Clozaril (175 Mg, Unk)
  • Clozaril (125 Mg, Unk)
  • Hirnamin (200 Mg, Unk)
  • Clozaril (200 Mg, Unk)
  • Clozaril (25 Mg, Unk)
  • Clozaril (50 Mg, Unk)
  • Clozaril (75 Mg, Unk)
and developed a serious reaction and side effect(s): Dehydration, Eosinophil Count Increased, Tubulointerstitial Nephritis, White Blood Cell Count Increased, Diarrhoea after the beginning of treatment. This case can indicate the possible existence of increased vulnerability to Blonanserin treatment in male patients, resulting in Dehydration side effect.
Blonanserin Side Effect Report#7931589-3
Fall, Overdose
This report suggests a potential Blonanserin Fall side effect(s) that can have serious consequences. A 34-year-old male patient (weight: NA) from Japan was diagnosed with the following symptoms/conditions: NA and used Blonanserin (dosage: NA) starting NS. After starting Blonanserin the patient began experiencing various side effects, including: Fall, OverdoseAdditional drugs used concurrently:
  • Lendormin
  • U Pan
  • Seroquel (4 X 75 Mg Daily)
  • Flunitrazepam
  • Levotomin
The patient was hospitalized. Although Blonanserin demonstrated significant improvements in a number of clinically relevant cases, troublesome symptoms, such as Fall, may still occur.
Blonanserin Side Effect Report#7897505-8
Weight Increased, Dyskinesia, Hallucination, Auditory, Electrocardiogram Qt Prolonged, Dystonia, Hyperphagia
This Weight Increased problem was reported by a physician from Japan. A 34-year-old female patient (weight: NA) was diagnosed with the following symptoms/conditions: NA. On NS this consumer started treatment with Blonanserin (dosage: NA). The following drugs were being taken at the same time:
  • Risperidone
  • Risperidone (4-6 Mg Per Day)
When using Blonanserin, the patient experienced the following unwanted symptoms/side effects: Weight Increased, Dyskinesia, Hallucination, Auditory, Electrocardiogram Qt Prolonged, Dystonia, HyperphagiaThe 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 Weight Increased, may become evident only after a product is in use by the general population.
Blonanserin Side Effect Report#7749981-9
Neuroleptic Malignant Syndrome, Bradykinesia
This Neuroleptic Malignant Syndrome side effect was reported by a physician from Japan. A 46-year-old male patient (weight:NA) experienced the following symptoms/conditions: NA.The patient was prescribed Blonanserin (drug dosage: 16 Mg/day), which was initiated on NS. Concurrently used drugs:
  • Flunitrazepam (4 Mg/day)
  • Carbamazepine
  • Biperiden Hydrochloride Tab
  • Etizolam
  • Promethazine
  • Clotiazepam
  • Topiramate (200 Mg/day)
  • Sulpiride
.After starting to take Blonanserin the consumer reported adverse symptoms, such as: Neuroleptic Malignant Syndrome, BradykinesiaThese side effects may potentially be related to Blonanserin. The patient was hospitalized.
Blonanserin Side Effect Report#7745420-2
Extrapyramidal Disorder, Malaise, Decubitus Ulcer, Psychiatric Symptom, Somnolence
This is a report of a 64-year-old male patient (weight: NA) from Japan, suffering from the following health symptoms/conditions: NA, who was treated with Blonanserin (dosage: NA, start time:
Oct 04, 2010), combined with:
  • Risperdal
  • Biperiden Hydrochloride Tab
  • Neuleptil
  • Flunitrazepam
  • Nitrazepam
  • Risperdal
and developed a serious reaction and side effect(s): Extrapyramidal Disorder, Malaise, Decubitus Ulcer, Psychiatric Symptom, Somnolence after the beginning of treatment. This case can indicate the possible existence of increased vulnerability to Blonanserin treatment in male patients, resulting in Extrapyramidal Disorder side effect.
Blonanserin Side Effect Report#7720361-5
Malaise, Decubitus Ulcer, Extrapyramidal Disorder, Somnolence, Psychiatric Symptom
This report suggests a potential Blonanserin Malaise side effect(s) that can have serious consequences. A 64-year-old male patient (weight: NA) from Japan was diagnosed with the following symptoms/conditions: NA and used Blonanserin (dosage: NA) starting NS. After starting Blonanserin the patient began experiencing various side effects, including: Malaise, Decubitus Ulcer, Extrapyramidal Disorder, Somnolence, Psychiatric SymptomAdditional drugs used concurrently:
  • Biperiden Hydrochloride Tab
  • Risperdal
  • Flunitrazepam
  • Risperdal
  • Nitrazepam
Although Blonanserin demonstrated significant improvements in a number of clinically relevant cases, troublesome symptoms, such as Malaise, may still occur.
Blonanserin Side Effect Report#7420272-9
Neuroleptic Malignant Syndrome, Rhabdomyolysis
This Neuroleptic Malignant Syndrome problem was reported by a physician from Japan. A male patient (weight: NA) was diagnosed with the following symptoms/conditions: NA. On
Nov 26, 2010 this consumer started treatment with Blonanserin (lonasen) (dosage: 2 Mg Oral, 4 Mg Oral, 6 Mg Oral). The following drugs were being taken at the same time: NA. When using Blonanserin (lonasen), the patient experienced the following unwanted symptoms/side effects: Neuroleptic Malignant Syndrome, RhabdomyolysisThe 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 Neuroleptic Malignant Syndrome, may become evident only after a product is in use by the general population.
Blonanserin Side Effect Report#7276498-0
Liver Disorder
This Liver Disorder side effect was reported by a health professional from Japan. A 32-year-old male patient (weight:NA) experienced the following symptoms/conditions: schizophrenia.The patient was prescribed Blonanserin (drug dosage: NA), which was initiated on
Sep 06, 2009. Concurrently used drugs:
  • Seroquel
  • Flunitrazepam
.After starting to take Blonanserin the consumer reported adverse symptoms, such as: Liver DisorderThese side effects may potentially be related to Blonanserin.
Blonanserin Side Effect Report#7230826-0
Lactation Disorder, Menstruation Irregular, Erythema, Acne
This is a report of a female patient (weight: NA) from Japan, suffering from the following health symptoms/conditions: ideas of reference, who was treated with Blonanserin (lonasen) (dosage: (4 Mg Oral), (8 Mg Oral), (12 Mg Oral), (18 Mg Oral), start time:
Jul 23, 2010), combined with: NA. and developed a serious reaction and side effect(s): Lactation Disorder, Menstruation Irregular, Erythema, Acne after the beginning of treatment. This case can indicate the possible existence of increased vulnerability to Blonanserin (lonasen) treatment in female patients, resulting in Lactation Disorder side effect. The patient was hospitalized.
Blonanserin Side Effect Report#7229028-3
Neurological Symptom
This report suggests a potential Blonanserin Neurological Symptom side effect(s) that can have serious consequences. A 49-year-old female patient (weight: NA) from Japan was diagnosed with the following symptoms/conditions: NA and used Blonanserin (dosage: NA) starting NS. After starting Blonanserin the patient began experiencing various side effects, including: Neurological SymptomAdditional drugs used concurrently:
  • Risperdal
Although Blonanserin demonstrated significant improvements in a number of clinically relevant cases, troublesome symptoms, such as Neurological Symptom, may still occur.
Blonanserin Side Effect Report#7208872-2
Neurological Symptom
This Neurological Symptom problem was reported by a physician from Japan. A 49-year-old female patient (weight: NA) was diagnosed with the following symptoms/conditions: NA. On NS this consumer started treatment with Blonanserin (dosage: NA). The following drugs were being taken at the same time:
  • Risperdal
When using Blonanserin, the patient experienced the following unwanted symptoms/side effects: Neurological SymptomAlthough all drugs are carefully tested before they are licensed for use, they carry side effect risks. Some side effects, such as Neurological Symptom, may become evident only after a product is in use by the general population.



The appearance of Blonanserin 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 Blonanserin Side Effects for Women?

Women Side Effects Reports
Neurological Symptom 2
Acne 1
Dyskinesia 1
Dystonia 1
Electrocardiogram Qt Prolonged 1
Erythema 1
Hallucination, Auditory 1
Hyperphagia 1
Lactation Disorder 1
Menstruation Irregular 1

What are common Blonanserin Side Effects for Men?

Men Side Effects Reports
Decubitus Ulcer 2
Extrapyramidal Disorder 2
Malaise 2
Neuroleptic Malignant Syndrome 2
Psychiatric Symptom 2
Somnolence 2
Bradykinesia 1
Dehydration 1
Diarrhoea 1
Eosinophil Count Increased 1

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.

    Blonanserin 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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    Side Effects reported to FDA: 11

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    Reported hospitalizations: 3

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