Effexor, or venlafaxine, is an antidepressant medication that alters the levels of serotonin and norepinephrine, which are neurotransmitters, or chemical signals, in the brain related to depression. The Mayo Clinic states that Effexor is prescribed for depression as well as for certain anxiety and panic disorders. Any patient taking this medication should be aware of the possible side effects of Effexor and know what to do if they occur.
Confusion
Effexor may cause confusion, according to Drugs.com. This occurs because the serotonin and norepinephrine have other effects in the brain. Therefore, changing the balance of these neurotransmitters can lead to confusion. If this occurs, a patient taking Effexor should call his doctor and let her know of the neurological effects he is experiencing. In addition, he should avoid operating heavy machinery or driving until his body adjusts to Effexor.
Upset Stomach
According to Drugs.com, Effexor may also cause an upset stomach. This occurs because serotonin and norepinephrine also help regulate digestion. Altering these chemical signals can lead to nausea, vomiting, diarrhea or constipation, states Drugs.com. A patient taking Effexor should make sure that she takes this medication with a full glass of water and with food as directed on the drug label. In addition, the Effexor pill should not be crushed or chewed. The patient should immediately let her doctor know if she is experiencing any digestion issues. Her doctor may prescribe a different medication to treat her symptoms.
Increased Blood Pressure
Drugs.com states that Effexor can cause an unwanted increase in blood pressure. This occurs because Effexor changes the balance of the neurotransmitter norepinephrine, which can result in an increase in blood pressure in the arteries and veins. This increase in blood pressure can put excessive strain on the heart, which may lead to serious cardiovascular complications. Therefore, a patient taking Effexor should have his blood pressure checked frequently. He should also let his doctor know if he begins to feel any other cardiovascular problems, such as an irregular heartbeat or chest pain.
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