The below information on Effexor has been taken from official FDA sources, but we cannot guarantee it's accuracy. Please use this site for educational purposes only. This site does not replace a proper discussion with your doctor.

    Brand Name:Effexor
    Generic:Venlafaxine Hydrochloride
This drug was approved by the FDA in one form or another on:
1993-12-28 ,
This drug is made in one form or another by the following companies:
Wyeth Pharmaceuticals, Inc.
This drug is available in the following forms:
Tablets and Capsules Extended Release
View the actual FDA approved label for this drug at the following links:

About Effexor

Effexor is in a class of medicines called serotonin and norepinephrine reuptake inhibitors (SNRIs).

Effexor is used to treat depression.
Effexor XR is used to treat:

  • Depression
  • Generalized anxiety disorder (GAD)
  • Social anxiety disorder (SAD)

Side Effects of Effexor

  • Possible life-threatening serotonin syndrome when used with triptan medicines.
  • Suicidal thoughts or actions: Persons taking Effexor may be more likely to think about killing themselves or actually try to do so, especially when Effexor is first started or the dose is changed. People close to persons taking Effexor can help by paying attention to changes in user’s moods or actions. Contact your healthcare professional right away if someone using Effexor talks about or shows signs of killing him or herself. If you are taking Effexor yourself and you start thinking about killing yourself, tell your healthcare professional about this side effect right away.
  • Stopping Effexor: Do not stop taking Effexor suddenly because you could get side effects. Your healthcare professional will slowly decrease your dose.
  • High blood pressure and heart problems: You may get high blood pressure or a faster heartbeat.
  • Bleeding problems:Effexor may cause bleeding problems.
  • Mania: You may become unusually hyperactive, excitable or elated.
  • Seizures: You may experience a seizure (convulsion), even if you are not taking Effexor close in time with a MAOI.
  • Pregnancy: Tell your healthcare professional if you are or may be pregnant because babies delivered to mothers taking Effexor late in pregnancy have developed problems, such as difficulty breathing and feeding.
  • Weight loss: Effexor can cause weight loss.
  • Sexual problems: You may have problems with impotence (erectile dysfunction), abnormal ejaculation, difficulty reaching orgasm, or decreased libido (sexual desire).
  • Other side effects include nausea, sleepiness, dry mouth, dizziness, difficulty sleeping and constipation.
  • Tell your healthcare professional about all your medical conditions, especially if you have liver, kidney, or heart disease, or glaucoma. Tell your healthcare professional if you are breast-feeding or plan to breast-feed your baby.

Who Should Not Take Effexor

Never take Effexor if you are taking another drug used to treat depression, called a Monoamine Oxidase Inhibitor (MAOI), or if you have stopped taking an MAOI in the last 14 days. Taking Effexor close in time to an MAOI can result in serious, sometimes fatal, reactions, including:

  • High body temperature
  • Coma
  • Seizures (convulsions)

MAOI drugs include Nardil (phenelzine sulfate), Parnate (tranylcypromine sulfate), Marplan (isocarboxazid), and other brands.

Interactions with Effexor

  • Effexor may interact with medicines other than the ones already mentioned in this information sheet. These interactions can cause serious side effects. Tell your healthcare professional about all medicines, vitamins, and herbal supplements you take.
  • If you plan to drink alcohol, talk to your healthcare professional.
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Recent Forum Posts on Effexor

No Subject

I began taking Effexor sometime ago, in a blind study for treatment of Fibromyalgia. I was diagnosed with this very painful ailment in 1991 or so. I had always suffered with a shoulder pain, which often felt like a burn, that radiated up to the neck and down my right arm. I did injections in the lower shoulder area and the neck with temporary relief. This pain would begin like a migrane. I felt the burn and before I could get somewhere and begin some type of preventive measure, I could not use the arm or even get it in a comfortable position. This was very inconvenient, particularly when driving.
In the blind study, I knew within a week that I had been given one of the high dosages. I never knew that there could be such relief. The study was halted after about a year or so, the withdrawls unbearable, and I was put on a traditional dosage of Effexor. Although I baby stepped the increments I stopped the dosage amount at 300 mg., the relief was slower to take effect. I now can say that the break through pain is almost non existant and for me that is wonderful. I can function without worry and the rest of my body has adjusted as well. I still have some stiffness but I think I can safely say I probably over do on many days and that is why I will continue to take this medication. It is because of the ability to do normal things that the side effects are of no concern.

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