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Effexor Abnormal Behaviour Side Effects

Effexor Abnormal Behaviour Side Effect Reports


The following Effexor Abnormal Behaviour side effect reports were submitted by healthcare professionals and consumers.

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

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



Homicidal Ideation, Abnormal Behaviour, Irritability

This Abnormal Behaviour side effect was reported by a physician from CA. A patient (weight:NA) experienced the following symptoms/conditions: depression. The patient was prescribed Effexor Xr (dosage: 37.5 Mg, Unk), which was started on 200410. Concurrently used drugs: NA. When starting to take Effexor Xr the consumer reported the following symptoms:
  • Homicidal Ideation
  • Abnormal Behaviour
  • Irritability
The patient was hospitalized. These side effects may potentially be related to Effexor Xr.
Suicidal Ideation, Mental Disorder, Abnormal Behaviour, Anger, Hostility, Weight Increased, Off Label Use

This Abnormal Behaviour Effexor Xr side effect was reported by a consumer or non-health professional from US on Feb 18, 2014. A Female , 23 years of age, weighting 249.1 lb, was diagnosed with and was treated with Effexor Xr. The patient presented the following health conditions:
  • Suicidal Ideation
  • Mental Disorder
  • Abnormal Behaviour
  • Anger
  • Hostility
  • Weight Increased
  • Off Label Use
. Effexor Xr dosage: 150 Mg, 1x/day. Additional drugs used at the same time: NA.
Corneal Reflex Decreased, Staring, Abnormal Behaviour, Hypomania, Dyskinesia, Anxiety, Malaise

This is a Effexor Xr side effect report of a 26-year-old patient (weight:NA) from US, suffering from the following symptoms/conditions: depression,schizoaffective disorder, who was treated with Effexor Xr (dosage:150 Mg, Daily, start time: Nov 06, 2013), combined with: NA., and developed a serious reaction and a Abnormal Behaviour side effect. The patient presented with:
  • Corneal Reflex Decreased
  • Staring
  • Abnormal Behaviour
  • Hypomania
  • Dyskinesia
  • Anxiety
  • Malaise
which developed after the beginning of treatment. This side effect report can indicate a possible existence of increased vulnerability to Effexor Xr treatment in patients suffering from depression,schizoaffective disorder, resulting in Abnormal Behaviour.

Depression, Withdrawal Syndrome, Abnormal Behaviour, Dyspnoea, Tremor, Dysphemia

A 53-year-old female patient (weight: NA) from US with the following symptoms: depression started Effexor Xr treatment (dosage: 75 Mg, 1x/day) on NS. Soon after starting Effexor Xr treatment, the consumer experienced several side effects, including:
  • Depression
  • Withdrawal Syndrome
  • Abnormal Behaviour
  • Dyspnoea
  • Tremor
  • Dysphemia
. Concurrently used drugs: NA. This finding indicates that some patients can be more vulnerable to developing Effexor Xr side effects, such as Abnormal Behaviour.
Abnormal Behaviour, Impulsive Behaviour, Irritability

A patient from US was prescribed and started Effexor on Nov 18, 2013. Patient felt the following Effexor side effects: abnormal behaviour, impulsive behaviour, irritability Additional patient health information: male , 40 years of age, The consumer reported the following symptoms: was diagnosed with and. Effexor dosage: 75 Mg, 1x/day. Concurrently used drugs: NA.
Abnormal Behaviour, Disorientation, Slow Speech, Aggression, Fall, Cerebellar Syndrome, Somnolence, Pupillary Reflex Impaired

This report suggests a potential Effexor Abnormal Behaviour side effect(s) that can have serious consequences. A 74-year-old patient from FR (weight:NA) was diagnosed with the following health condition(s): depression,pain and used Effexor (dosage: 75 Mg, Twice Daily) starting Oct 04, 2013. Soon after starting Effexor the patient began experiencing various side effects, including:
  • Abnormal Behaviour
  • Disorientation
  • Slow Speech
  • Aggression
  • Fall
  • Cerebellar Syndrome
  • Somnolence
  • Pupillary Reflex Impaired
Drugs used concurrently:
  • Tramadol Hcl (200 Mg, Once Daily)
  • Zopiclone (7.5 Mg, Once Daily)
  • Lexomil (12 Mg, Once Daily)
  • Diffu K (Unk)
  • Spironolactone (Unk)
  • Kardegic (Unk)
The patient was hospitalized. Although Effexor demonstrated significant improvements in a number of clinically relevant cases, troublesome symptoms, such as Abnormal Behaviour, may still occur.
Abnormal Behaviour, Paraesthesia, Screaming, Dysgeusia

An adverse event was reported by a consumer or non-health professional on Oct 10, 2013 by a male taking Effexor Xr (dosage: 75 Mg, 1x/day) was diagnosed with and. Location: US , 26 years of age, weighting 186.0 lb, patient began experiencing various side effects, including: Directly after treatment started, patient experienced the unwanted or unexpected Effexor side effects: abnormal behaviour, paraesthesia, screaming, dysgeusia. Additional medications/treatments:
Crying, Disorientation, Confusional State, Suicidal Ideation, Paraesthesia, Anxiety, Anger, Abnormal Behaviour

This Abnormal Behaviour problem was reported by a consumer or non-health professional from US. A 06-year-old female patient (weight: NA) was diagnosed with the following medical condition(s): depression.On Jun 21, 2005 a consumer started treatment with Effexor (dosage: NA). The following drugs/medications were being taken at the same time: NA. When commencing Effexor, the patient experienced the following unwanted symptoms /side effects:
  • Crying
  • Disorientation
  • Confusional State
  • Suicidal Ideation
  • Paraesthesia
  • Anxiety
  • Anger
  • Abnormal Behaviour
Although all drugs are carefully tested before they are licensed for use, they carry potential side effect risks. Some side effects, such as Abnormal Behaviour, may become evident only after a product is in use by the general population.
Suicidal Ideation, Anxiety, Abnormal Behaviour

This is a Effexor Xr side effect report of a 43-year-old female patient (weight: NA) from US. The patient developed the following symptoms/conditions: depression and was treated with Effexor Xr (dosage: 75 Mg, 1x/day) starting 2012. Concurrently used drugs: NA. Soon after that, the consumer experienced the following of symptoms:
  • Suicidal Ideation
  • Anxiety
  • Abnormal Behaviour
This opens a possibility that Effexor Xr could cause Abnormal Behaviour and that some female patients may be more susceptible.
Dizziness, Chest Discomfort, Agitation, Serotonin Syndrome, Abnormal Behaviour

This Abnormal Behaviour side effect was reported by a pharmacist from US on Jan 17, 2013. A female patient from US , 18 years of age, weighting 141.1 lb, was treated with Effexor Xr. Directly after treatment started, patient experienced the unwanted or unexpected Effexor side effects: dizziness, chest discomfort, agitation, serotonin syndrome, abnormal behaviour. Effexor Xr dosage: NA.
Associated medications used:
  • Adderall Xr
These side effects may potentially be related to Effexor Xr.
Pneumonia, Withdrawal Syndrome, Depression, Gastric Disorder, Dizziness, Migraine, Abnormal Behaviour, Bedridden

This Abnormal Behaviour side effect was reported by a consumer or non-health professional from US. A 80-year-old female patient (weight:NA) experienced the following symptoms/conditions: depression. The patient was prescribed Effexor Xr (dosage: 150 Mg, Unk), which was started on Dec 24, 2012. Concurrently used drugs: NA. When starting to take Effexor Xr the consumer reported the following symptoms:
  • Pneumonia
  • Withdrawal Syndrome
  • Depression
  • Gastric Disorder
  • Dizziness
  • Migraine
  • Abnormal Behaviour
  • Bedridden
The patient was hospitalized. These side effects may potentially be related to Effexor Xr.
Self Injurious Behaviour, Abnormal Behaviour, Agitation, Injury Corneal, Social Avoidant Behaviour, Enuresis, Sleep Terror, Visual Impairment, Dry Skin

This Abnormal Behaviour Effexor Xr side effect was reported by a consumer or non-health professional from US on Dec 24, 2012. A male , child 10 years of age, was diagnosed with and was treated with Effexor Xr. The patient presented the following health conditions:
  • Self Injurious Behaviour
  • Abnormal Behaviour
  • Agitation
  • Injury Corneal
  • Social Avoidant Behaviour
  • Enuresis
  • Sleep Terror
  • Visual Impairment
  • Dry Skin
. Effexor Xr dosage: Unk, 1x/day. Additional drugs used at the same time:
  • Provigil (Unk, 1x/day)
  • Provigil
  • Xyrem (Unk, Daily At Night)
Suicidal Ideation, Abnormal Behaviour, Speech Disorder, Feeling Abnormal, Hyperhidrosis, Weight Decreased, Emotional Disorder, Attention Deficit/hyperactivity Disorder, Weight Increased

This is a Effexor Xr side effect report of a 29-year-old female patient (weight:NA) from US, suffering from the following symptoms/conditions: depression, who was treated with Effexor Xr (dosage:Unk, start time: 2001), combined with: NA., and developed a serious reaction and a Abnormal Behaviour side effect. The patient presented with:
  • Suicidal Ideation
  • Abnormal Behaviour
  • Speech Disorder
  • Feeling Abnormal
  • Hyperhidrosis
  • Weight Decreased
  • Emotional Disorder
  • Attention Deficit/hyperactivity Disorder
  • Weight Increased
which developed after the beginning of treatment. The patient was hospitalized and became disabled. This side effect report can indicate a possible existence of increased vulnerability to Effexor Xr treatment in female patients suffering from depression, resulting in Abnormal Behaviour.
Psychomotor Hyperactivity, Somnolence, Abnormal Behaviour

A 2-year-old female patient (weight: NA) from US with the following symptoms: NA started Effexor treatment (dosage: 37.5 Mg, Once) on Nov 14, 2012. Soon after starting Effexor treatment, the consumer experienced several side effects, including:
  • Psychomotor Hyperactivity
  • Somnolence
  • Abnormal Behaviour
. Concurrently used drugs: NA. This finding indicates that some patients can be more vulnerable to developing Effexor side effects, such as Abnormal Behaviour.
Enzyme Inhibition, Nausea, Withdrawal Syndrome, Feeling Abnormal, Hot Flush, Hyperhidrosis, Abnormal Behaviour, Off Label Use

A female patient from US was prescribed and started Effexor Xr on Dec 10, 2012. After Effexor was administered, patient encountered several Effexor side effects: enzyme inhibition, nausea, withdrawal syndrome, feeling abnormal, hot flush, hyperhidrosis, abnormal behaviour, off label use Additional patient health information: Female , 66 years of age, weighting 133.0 lb, The consumer reported the following symptoms: was diagnosed with and. Effexor Xr dosage: 35 Mg, Daily. Concurrently used drugs:
  • Venlafaxine Hydrochloride (35 Mg, Daily)
  • Letrozole (2.5 Mg, Daily)
Suicidal Ideation, Mood Swings, Hallucination, Depressed Mood, Abnormal Behaviour, Oedema, Loss Of Libido

This report suggests a potential Effexor Xr Abnormal Behaviour side effect(s) that can have serious consequences. A 42-year-old female patient from US (weight:NA) was diagnosed with the following health condition(s): depression and used Effexor Xr (dosage: 300 Mg, Daily) starting 201209. Soon after starting Effexor Xr the patient began experiencing various side effects, including:
  • Suicidal Ideation
  • Mood Swings
  • Hallucination
  • Depressed Mood
  • Abnormal Behaviour
  • Oedema
  • Loss Of Libido
Drugs used concurrently:NA. Although Effexor Xr demonstrated significant improvements in a number of clinically relevant cases, troublesome symptoms, such as Abnormal Behaviour, may still occur.
Hyperhidrosis, Gait Disturbance, Hot Flush, Abnormal Behaviour, Blood Triglycerides Decreased, Erectile Dysfunction, Gastrointestinal Viral Infection

An adverse event was reported by a consumer or non-health professional on Mar 26, 2012 by a male taking Effexor (dosage: Unk) . Location: UNITED STATES , weighting 229.3 lb, patient began experiencing various side effects, including: Patient felt the following Effexor side effects: hyperhidrosis, gait disturbance, hot flush, abnormal behaviour, blood triglycerides decreased, erectile dysfunction, gastrointestinal viral infection. Additional medications/treatments:
Multiple prescriptions taken:
  • Effexor Xr (225 Mg, Daily)
  • Clonazepam (1 Mg, Unk)
  • Effexor Xr (225 Mg, 1x/day)
  • Effexor Xr (75mg, Daily)
  • Alprazolam (0.5 Mg, 3x/day)
  • Zyprexa (5 Mg, 1x/day)
  • Effexor Xr (150mg, Daily)
  • Alprazolam (0.25 Mg, 3x/day)
Gambling, Abnormal Behaviour

This Abnormal Behaviour problem was reported by a physician from AUSTRALIA. A 45-year-old patient (weight: NA) was diagnosed with the following medical condition(s): NA.On NS a consumer started treatment with Effexor Xr (dosage: Unk). The following drugs/medications were being taken at the same time: NA. When commencing Effexor Xr, the patient experienced the following unwanted symptoms /side effects:
  • Gambling
  • Abnormal Behaviour
Although all drugs are carefully tested before they are licensed for use, they carry potential side effect risks. Some side effects, such as Abnormal Behaviour, may become evident only after a product is in use by the general population.
Blood Triglycerides Decreased, Abnormal Behaviour, Hot Flush, Gait Disturbance, Gastrointestinal Viral Infection, Hyperhidrosis, Erectile Dysfunction

This is a Effexor Xr side effect report of a patient (weight: NA) from UNITED STATES. The patient developed the following symptoms/conditions: NA and was treated with Effexor Xr (dosage: 75mg/day) starting Jan 01, 2006. Concurrently used drugs:
  • Zyprexa (5 Mg, 1x/day)
Soon after that, the consumer experienced the following of symptoms:
  • Blood Triglycerides Decreased
  • Abnormal Behaviour
  • Hot Flush
  • Gait Disturbance
  • Gastrointestinal Viral Infection
  • Hyperhidrosis
  • Erectile Dysfunction
This opens a possibility that Effexor Xr could cause Abnormal Behaviour and that some patients may be more susceptible.
Erectile Dysfunction, Abnormal Behaviour, Gait Disturbance, Hot Flush, Gastrointestinal Viral Infection, Hyperhidrosis, Blood Triglycerides Decreased

This Abnormal Behaviour side effect was reported by a consumer or non-health professional from UNITED STATES on Dec 13, 2011. A patient from UNITED STATES , weighting 230.0 lb, was treated with Effexor. Patient felt the following Effexor side effects: erectile dysfunction, abnormal behaviour, gait disturbance, hot flush, gastrointestinal viral infection, hyperhidrosis, blood triglycerides decreased. Effexor dosage: Unk.
Multiple prescriptions taken:
  • Xanax
  • Effexor Xr (150mg/day)
  • Effexor Xr (75mg/day)
  • Effexor Xr (225 Mg/day)
  • Xanax (0.5 Mg, 3x/day)
  • Zyprexa (5 Mg, 1x/day)
  • Effexor Xr (225 Mg, 1x/day)
These side effects may potentially be related to Effexor.
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DISCLAIMER: ALL DATA PROVIDED AS-IS, refer to terms of use for additional information.

Effexor Abnormal Behaviour Causes and Reviews


Alcohol can harm your baby at any stage during a pregnancy. That includes the earliest stages, before you even know you are pregnant. Drinking during pregnancy can cause a group of conditions called fetal alcohol spectrum disorders (FASDs). Children who are born with FASD can have a mix of problems, such as medical, behavioral, educational, and social problems. The kinds of problems they have depend on which type of FASD they have. The problems could include

  • Abnormal facial features, such as a smooth ridge between the nose and upper lip
  • Small head size
  • Shorter-than-average height
  • Low body weight
  • Poor coordination
  • Hyperactive behavior
  • Difficulty with attention and memory
  • Learning disabilities and difficulty in school
  • Speech and language delays
  • Intellectual disability or low IQ
  • Poor reasoning and judgment skills
  • Sleep and sucking problems as a baby
  • Vision or hearing problems
  • Problems with the heart, kidneys, or bones

Fetal alcohol syndrome (FAS) is the most serious type of FASD. People with fetal alcohol syndrome have facial abnormalities, including wide-set and narrow eyes, growth problems and nervous system abnormalities.

Diagnosing FASD can be hard because there is no medical test for it. The health care provider will make a diagnosis by looking at the child's signs and symptoms, and will ask whether the mother drank alcohol during pregnancy.

FASDs last a lifetime. There is no cure for FASDs, but treatments can help. These include medicines to help with some symptoms, medical care for health problems, behavior and education therapy, and parent training. A good treatment plan is specific to the child's problems. It should include close monitoring, follow-ups, and changes when needed.

Certain "protective factors" can help reduce the effects of FASDs and help people who have them reach their full potential. They include

  • Diagnosis before 6 years of age
  • Loving, nurturing, and stable home environment during the school years
  • Absence of violence around them
  • Involvement in special education and social services

There is no known safe amount of alcohol during pregnancy. To prevent FASDs, you should not drink alcohol while you are pregnant, or when you might get pregnant.

Centers for Disease Control and Prevention


Effexor Abnormal Behaviour Reviews

Sun, 06 May 2012

I'm experiencing severe dizyness almost do face plants to the ground a dozen times a day. Can't focus  when tryin to read.
Always confused and forgetfull .
about to loose my job if this shit continues.

Tue, 02 Oct 2012

all of the above plus hives massive weight gain....An evil drug...should be taken off the market!!

Mon, 02 May 2011

Thank you everyone. I am definitely going to tell my shrink that I need to get off Effexor
immediately. Does anyone out there also take lithium and temazapam(sleeping pill)?

Thu, 07 Jun 2012

Does anyone else feel that Effexor XR doesn't work as well when they are either having a bout of influenza or herpes, or another viral infection?  I get brain zaps even on my normal dosage (150mg/day) if I am experiencing a cold or herpes outbreak.

Wed, 04 Nov 2009
tendon tears Effexor?
Tue, 12 May 2009
Effexor raised my blood presure alot ,I had extreme painful headaches,rash that started on my face which was horrible,then spread to my chest,my neck was beat red I itched so badly.I think docotrs need to be more educated on this med before giveing it out so quickly.
Sun, 17 May 2009
Effexor was horrible for me...as soon as I started it I started having panic attacks worse than ever (supposed to help them) scary bad dreams, waking up in a sweat and not knowing who I was, then depression. The first day I expeirenced the panic attacks fast heartrate, I called my Dr. and he assured me that it could not have taken effect that fast, not true! He told me to keep takin the medicine, I trusted his word until I ended up in the hospital feeling like I was loosing my mind. I ended up going into a very deep depression. This was many years ago but I read some of the post and thought I would share my experience. If your told that there is no way that you could be feeling any interactions on the first day, use your own judgement, I trusted my Dr's word and I almost died.
Sat, 11 Jun 2011
I Lost my children because of this drug, i almost took my own life and a life of someone very close to me, I also have liver damage, who do these people think they are making these and giving them to people?
Wed, 02 Dec 2009
Effexor amp; Pristiq is poison - I would know, I started taking it at 16 yrs old, instead of counselling I was given Effexor by a 'psychiatrist drug dealer' I was never offered counselling. I spent of $25,000 on this medication in my lifetime. Discontinuation Syndrome has been my worst nightmare. The brain zaps are disgusting. I wish I could get all of the people who hate venlafaxine together to sue these pharmaceutical companies. They have earnt billions of dollars off the suffering of us and we are the only ones who pay.
DISCLAIMER: ALL DATA PROVIDED AS-IS, refer to terms of use for additional information.

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Top Effexor Side Effects

Dizziness (702)
Anxiety (595)
Nausea (594)
Depression (503)
Headache (495)
Feeling Abnormal (492)
Suicidal Ideation (449)
Condition Aggravated (436)
Paraesthesia (372)
Malaise (353)
Insomnia (349)
Fatigue (286)
Crying (285)
Confusional State (269)
Agitation (265)
Hyperhidrosis (263)
Asthenia (249)
Diarrhoea (236)
Tremor (236)
Convulsion (235)
Completed Suicide (222)
Hypertension (221)
Fall (219)
Disturbance In Attention (207)
Vomiting (204)
Aggression (201)
Blood Pressure Increased (194)
Anger (193)
Withdrawal Syndrome (183)
Somnolence (180)
Pain (177)
Suicide Attempt (175)
Weight Increased (163)
Abnormal Behaviour (151)
Dyspnoea (150)
Amnesia (150)
Intentional Overdose (136)
Irritability (135)
Abnormal Dreams (123)
Tinnitus (118)
Activities Of Daily Living Impaired (117)
Serotonin Syndrome (115)
Panic Attack (111)
Loss Of Consciousness (111)
Arthralgia (110)
Nightmare (109)
Disorientation (108)
Off Label Use (106)
Overdose (106)
Emotional Disorder (105)

➢ More

Effexor Common Side Effects

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

Examples: headache, dizziness

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

Dizziness (702)
Anxiety (595)
Nausea (594)
Depression (503)
Headache (495)
Feeling Abnormal (492)
Suicidal Ideation (449)
Condition Aggravated (436)
Paraesthesia (372)
Malaise (353)
Insomnia (349)
Fatigue (286)
Crying (285)
Confusional State (269)
Agitation (265)
Hyperhidrosis (263)
Asthenia (249)
Diarrhoea (236)
Tremor (236)
Convulsion (235)

➢ More


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