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    Side Effects

    List Effexor side effects by likelihood and severity.

    The following side effects are associated with Effexor:

    Common side effects of Effexor:

    • Blurred VisionSevere
    • Disturbance in the Ability of the Eye to FocusSevere
    • Head PainSevere
    • Problems with EyesightSevere
    • AnxiousLess Severe
    • Chronic Trouble SleepingLess Severe
    • DizzyLess Severe
    • DrowsinessLess Severe
    • Dry MouthLess Severe
    • Excessive SweatingLess Severe
    • Feel Like Throwing UpLess Severe
    • Feeling WeakLess Severe
    • Inability to have an ErectionLess Severe
    • Incomplete or Infrequent Bowel MovementsLess Severe
    • Involuntary QuiveringLess Severe
    • Loss of AppetiteLess Severe
    • NervousLess Severe
    • Numbness and TinglingLess Severe
    • Problem with EjaculationLess Severe
    • Stomach CrampsLess Severe
    • Taste ProblemsLess Severe
    • Throwing UpLess Severe

    Infrequent side effects of Effexor:

    • A Feeling of Restlessness with Inability to Sit StillSevere
    • Cannot Empty BladderSevere
    • Chest PainSevere
    • ConfusedSevere
    • DepressionSevere
    • Fast HeartbeatSevere
    • Feeling RestlessSevere
    • Frequent UrinationSevere
    • High Blood PressureSevere
    • High CholesterolSevere
    • ItchingSevere
    • RashSevere
    • Ringing in the EarsSevere
    • Sexual ProblemsSevere
    • Abnormal DreamsLess Severe
    • Altered Interest in Having Sexual IntercourseLess Severe
    • BronchitisLess Severe
    • ChillsLess Severe
    • DiarrheaLess Severe
    • Easily Angered or AnnoyedLess Severe
    • Feeling Anger Toward SomethingLess Severe
    • GasLess Severe
    • IndigestionLess Severe
    • Inflammation or Infection of VaginaLess Severe
    • Migraine HeadacheLess Severe
    • Neck PainLess Severe
    • Orgasm ProblemsLess Severe
    • Sensation of Spinning or WhirlingLess Severe
    • TwitchingLess Severe
    • Visible Water RetentionLess Severe
    • Weight GainLess Severe
    • Weight LossLess Severe
    • YawningLess Severe

    Rare side effects of Effexor:

    • Abnormal Heart Electrical SignalsSevere
    • Abnormal Movements of Face Muscles and TongueSevere
    • Altered Mental StatusSevere
    • Behaving with Excessive Cheerfulness and ActivitySevere
    • Bleeding of the Stomach or IntestinesSevere
    • Blood Pressure Drop Upon StandingSevere
    • Decreased Blood PlateletsSevere
    • Deficiency of Granulocytes a Type of White Blood CellSevere
    • Difficult or Painful UrinationSevere
    • Enlarged ProstateSevere
    • Erythema MultiformeSevere
    • Extrapyramidal ReactionSevere
    • Fluid Retention in the Legs, Feet, Arms or HandsSevere
    • Giant HivesSevere
    • Having Thoughts of SuicideSevere
    • Hemorrhage of Blood Under the SkinSevere
    • HepatitisSevere
    • Increased Pressure in the EyeSevere
    • Increased Risk of BleedingSevere
    • Interstitial PneumonitisSevere
    • Life Threatening Allergic ReactionSevere
    • LockjawSevere
    • Loss of One's Own Sense of Reality or IdentitySevere
    • Low Amount of Sodium in the BloodSevere
    • Low Blood Counts due to Bone Marrow FailureSevere
    • low blood sugarSevere
    • Mild Degree of ManiaSevere
    • Mood ChangesSevere
    • Neuroleptic Malignant SyndromeSevere
    • PancreatitisSevere
    • Pneumonia with High Amount of Eosinophil White Blood CellsSevere
    • Prolonged Q-T Interval on EKGSevere
    • secondary angle-closure glaucomaSevere
    • SeizuresSevere
    • Serious Muscle Damage that may Lead to Kidney FailureSevere
    • Serotonin Syndrome - Adverse Drug InteractionSevere
    • Sinus Irritation and CongestionSevere
    • Stevens-Johnson SyndromeSevere
    • Syndrome of Inappropriate Antidiuretic Hormone SecretionSevere
    • Toxic Epidermal NecrolysisSevere
    • Trouble BreathingSevere
    • Ventricular FibrillationSevere
    • Very Rapid Heartbeat - Torsades de PointesSevere
    • Abnormal Increase in Muscle ToneLess Severe
    • Abnormal Liver Function TestsLess Severe
    • Abnormally Acute Hearing or Painful Sensitivity to SoundLess Severe
    • Abnormally Long or Heavy PeriodsLess Severe
    • Bleeding Not Related to Menstrual PeriodLess Severe
    • BurpingLess Severe
    • DeliriumLess Severe
    • Dilated PupilLess Severe
    • Elevation of Proteins in the UrineLess Severe
    • Flu-Like SymptomsLess Severe
    • Grinding of the TeethLess Severe
    • Hair LossLess Severe
    • Heart Throbbing or PoundingLess Severe
    • HemorrhageLess Severe
    • HivesLess Severe
    • increased prolactin in the bloodLess Severe
    • Inflammation of the NoseLess Severe
    • Muscle StiffnessLess Severe
    • NosebleedLess Severe
    • Painful PeriodsLess Severe
    • Sun-Sensitive SkinLess Severe
    • Temporary Redness of Face and NeckLess Severe
    • UncoordinatedLess Severe
    • Widening of Blood VesselsLess Severe

    Selected from data included with permission and copyrighted by First Databank, Inc. This copyrighted material has been downloaded from a licensed data provider and is not for distribution, expect as may be authorized by the applicable terms of use.

    CONDITIONS OF USE: The information in this database is intended to supplement, not substitute for, the expertise and judgment of healthcare professionals. The information is not intended to cover all possible uses, directions, precautions, drug interactions or adverse effects, nor should it be construed to indicate that use of a particular drug is safe, appropriate or effective for you or anyone else. A healthcare professional should be consulted before taking any drug, changing any diet or commencing or discontinuing any course of treatment.

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