Common Side Effects of EFFEXOR XR® (venlafaxine HCl) | Safety Info

Learn About Common Side Effects

It is important to be aware of the possible side effects when taking any medication. Be sure to tell your doctor if you experience any side effects. Please see additional warnings and Important Safety Information at right.

Common Side Effects

In clinical studies, the most common side effects with EFFEXOR XR were:

  • Unusual dreams
  • Sexual problems
  • Loss of appetite, constipation, diarrhea, nausea or vomiting, or dry mouth
  • Feeling tired, fatigued, or overly sleepy
  • Change in sleep habits, problems sleeping
  • Yawning
  • Tremor or shaking
  • Dizziness, blurred vision
  • Sweating
  • Feeling anxious, nervous, or jittery
  • Headache
  • Increase in heart rate

EFFEXOR XR is available in different dosage strengths (37.5 mg, 75 mg, and 150 mg).

Indications

Effexor XR extended-release capsules are a prescription medicine indicated for the treatment, in adults, of Depression, Generalized Anxiety Disorder (GAD), Social Anxiety Disorder (SAD), and Panic Disorder (PD) with or without agoraphobia.

Important Safety Information

Suicidality and Antidepressant Drugs

Antidepressants increased the risk compared to placebo of suicidal thinking and behavior (suicidality) in children, teens, and young adults. Depression and certain other psychiatric disorders are themselves associated with increases in the risk of suicide. Patients of all ages who are started on antidepressant therapy should be monitored appropriately and observed closely for clinical worsening, suicidality, or unusual changes in behavior. Effexor XR is not approved for use in children and teens.

  • Do not take Effexor XR if you currently take, or have taken within the last 14 days, any medicine known as an MAOI such as linezolid or methylene blue. Do not take an MAOI within 7 days of stopping Effexor XR. Ask your doctor or pharmacist if you are not sure if your medicine is an MAOI.
  • All patients taking antidepressants should be watched closely for signs that their condition is getting worse or that they are becoming suicidal, especially when they first start therapy, or when their dose is increased or decreased. Patients should also be watched for becoming agitated, irritable, hostile, aggressive, impulsive, or restless. Such symptoms should be reported to the patient’s doctor right away.
  • Before starting Effexor XR, tell your doctor if you’re taking or plan to take any prescription or over-the-counter drugs, including migraine headache medication, herbal preparations, and nutritional supplements, to avoid a potentially life-threatening condition.
  • Effexor XR may raise blood pressure in some patients. Your blood pressure should be controlled before starting treatment and should be monitored regularly.
  • Taking Effexor XR with aspirin, nonsteroidal anti-inflammatory drugs, warfarin, or other drugs that affect coagulation may increase the risk of bleeding events.
  • Some people are at risk for visual problems such as eye pain, changes in vision, or swelling or redness around the eye. You may want to undergo an eye examination to see if you are at risk and get preventative treatment if you are.
  • When people suddenly stop using or quickly lower their daily dose of Effexor XR, discontinuation symptoms may occur. Talk to your doctor before discontinuing or reducing your dose of Effexor XR.
  • Pregnant or nursing women shouldn’t take any antidepressant without consulting their doctor.
  • Until you see how Effexor XR affects you, be careful doing such activities as driving a car or operating machinery. Avoid drinking alcohol while taking Effexor XR.
  • In clinical studies, the most common side effects with Effexor XR (reported in at least 5% of patients and at least twice as often as with placebo) were constipation, dizziness, dry mouth, insomnia, loss of appetite, nausea, nervousness, sexual side effects, sleepiness, sweating, and weakness.

Patients should always ask their doctors for medical advice about adverse events.

You may report an adverse event related to Pfizer products by calling 1-800-438-1985 (US only). If you prefer, you may contact the U.S. Food and Drug Administration (FDA) directly. The FDA has established a reporting service known as MedWatch where health care professionals and consumers can report serious problems they suspect may be associated with the drugs and medical devices they prescribe, dispense, or use. Visit MedWatch or call 1-800-FDA-1088.

Please see Full Prescribing Information, including BOXED WARNING, and Medication Guide for EFFEXOR XR.