Effexor Side Effects
Effexor (generic name, Venlafaxine hydrochloride) is an antidepressant
medication. It is typically prescribed for continuing depression that interferes
with daily functioning. The symptoms of this type of depression usually include
changes in appetite, sleep habits, and mind/body coordination, decreased sex
drive, increased fatigue, feelings of guilt or worthlessness, difficulty concentrating,
slowed thinking, and suicidal thoughts. Effexor is said to work by affecting
chemicals in the brain that may become unbalanced and cause depression or
anxiety. Effexor XR is the extended release form of this prescription medication.
Effexor Side Effects
Side effects can never be fully anticipated for any individual, however if
any of the side effects below are noted, if they increase in intensity or
if they are particularly troubling or bothersome you should inform your doctor
Common Effexor Side Effects
Muscle tension, nausea, infection, insomnia, vomiting, nervousness, rash,
sleepiness, sweating, tingling feeling, tremor, upset stomach, abnormal dreams,
abnormal ejaculation or orgasm, anxiety, appetite loss, blurred vision, chills,
constipation, diarrhea, dizziness, dry mouth, frequent urination, flushing,
gas, headache, impotence, weakness, yawning.
Less Common Effexor Side Effects
Dizziness upon standing up, high blood pressure, ringing in the ears, trauma,
twitching, itching, loss of identity, abnormal taste, abnormal thinking, agitation,
chest pain, confusion, decreased sex drive, depression, dilated pupils, rapid
heartbeat, urinary problems, weight loss.
A wide variety of very rare symptoms possibly related to Effexor have also
been reported. If you develop any new or unusual problems, let your doctor
know about it. Additionally, it is quite possible for side effects other than
those listed here to occur. If this happens and/or if any seem particularly
strange or bothersome, contact your doctor.
Special Effexor Precautions
Serious, sometimes fatal reactions have occurred when Effexor is used in combination
with other drugs that are known as MAO inhibitors. This includes the antidepressants
Nardil and Parnate. Effexor should never be taken with one of these drugs;
and therapy with Effexor should not be started within 14 days of discontinuing
treatment with one of these drugs. Additionally, allow at least 7 days between
the last dose of Effexor and the first dose of an MAO inhibitor.
Effexor should be prescribed with caution if you have high blood pressure,
heart, liver, or kidney disease or a history of seizures or mania (extreme
agitation or excitability). You should discuss all past and present medical
problems with your doctor before taking Effexor.
Effexor sometimes causes an increase in the patient's blood pressure. If this
happens, the dosage may need to be reduced or discontinued totally. Especially
at higher doses, Effexor may also cause an increase the heart rate. Use Effexor
with caution if you've recently had a heart attack, suffer from heart failure,
or have an overactive thyroid gland.
Effexor may cause you to feel drowsy or less alert and may affect your judgment.
Thus, avoid driving or operating dangerous machinery or participating in any
hazardous activity that requires full mental alertness until you know specifically
how Effexor affects you.
Your doctor will check you regularly if you have glaucoma (high pressure in
the eye), or you are at risk of developing it. If you have ever been addicted
to drugs, tell your doctor before you start taking Effexor. Do not stop taking
Effexor without consulting your doctor. If you stop suddenly, you may have
withdrawal symptoms. Your doctor will have you taper off gradually.
The safety and effectiveness of Effexor has not been established in children
under 18 years of age.
If Effexor is taken with certain other drugs, the effects of either could
be increased, decreased, or altered. It is especially important to check with
your doctor before combining Effexor with any other prescription or non-prescription
drugs and even alcohol.
Warning: This information is intended to
supplement, not be a substitute for the expertise and judgment of
a doctor. Please consult a doctor for final and more detailed information
about the possible side effects of this prescription medication.