People suffering from depression or anxiety may turn to Effexor for relief. Effexor, the brand name of the medication venlafaxine, is used for treating depression and anxiety disorders, and most of the side effects of the medication are mild or temporary. However, taking Effexor is not without risk. Although rare, Effexor can cause dangerous side effects. Speak to your doctor about these potential risks before deciding if Effexor is right for you.
Increased Blood Pressure
People taking Effexor may experience a dangerous increase in blood pressure. Effexor's website warns that people with a history of high blood pressure should talk to a doctor before using the medication, and a doctor should regularly monitor those at risk of an increase in blood pressure. Physical symptoms that blood pressure is increasing include a severe headache and blurred vision. Those experiencing these symptoms should check their blood pressure and seek medical attention if it is abnormally high.
Serotonin Syndrome
Although serotonin syndrome is rare, it is a dangerous condition. People showing symptoms of serotonin syndrome should contact their doctor immediately. Signs and symptoms of serotonin syndrome include confusion, mental changes, nausea, vomiting, diarrhea, hallucinations, rapid heartbeat, blood pressure changes, irregular heart rhythm, fever, shivering, sweating, chills, shakiness, overactive reflexes, seizures and even a coma, eMedTV.com explains.
Allergic Reaction
Effexor causes an allergic reaction in some people. Signs of an allergic reaction include skin rash or hives, itching, difficulty breathing or swallowing, wheezing or unexplained swelling of the face, lips, tongue or throat. Those experiencing these signs should seek medical help immediately, Drugs.com warns.
Changes in Mental State
Although rare, some people taking Effexor experience a negative change in mental state, where depression or anxiety gets worse instead of better, Effexor's website warns. Symptoms or signs of this may include mood changes, anxiety, panic attacks, agitation or irritability, aggressiveness, mania and severe restlessness. In addition, some may experience thoughts of self-harm or even suicide. It is important that all people experiencing these symptoms contact a doctor as soon as possible, especially if these are new symptoms or they get worse instead of better. Patients should also instruct family members to be on the lookout for these signs, as they themselves may not be aware of their mental condition while taking Effexor.
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