Effexor (Venlafaxine) Basics


Venlafaxine is used to treat depression, anxiety and panic attack and nerve inflammation. It may also be used to treat hot flashes that occur in menopause.
This drug also comes in tablet and capsule forms
It is known as a serotonin-norepinephrine reuptake inhibitor (SNRI). It works by helping to restore the balance of serotonin and norepinephrine in the brain.

Before prescribing this medicine, your doctor should be told if you have any of these conditions:
Bleeding problems
Glaucoma (angle-closure type)
Heart problems (such as heart failure, previous heart attack)
High cholesterol
Kidney disease
Low levels of sodium in the blood
High blood pressure
Mania or bipolar disorder
Seizure disorders
Suicidal thoughts, plans, or attempt
Liver disease
Take medicines that treat or prevent blood clots
Thyroid disease

Before taking venlafaxine, tell your doctor if you are allergic to it; or to desvenlafaxine; or if you have any other allergies. As this product may contain inactive ingredients, which can stimulate allergic reactions.

effexor and alcohol. This drug may cause dizziness, drowsiness or blurred vision. Do not drive or operate machinery, or do any activity that requires alertness or clear vision while on this medication. Do not use with alcoholic beverages.

Your throat and mouth may feel dry. Chewing sugarless gum, and/or drinking plenty of water will help. Contact your doctor if the problem does not go away or is severe.

Older adults may be more vulnerable to the effects of this drug, especially bleeding and dizziness when standing. They are also more likely to develop hyponatremia, especially if they are taking diuretics. Dizziness and salt imbalance can increase the risk of falling.
Children also may be very sensitive to the effects of the drug, especially loss of appetite and weight loss. Monitor weight and height of children who are using this medication.

During pregnancy, this medication should only be used when absolutely needed. It may harm the fetus. Also, babies of women who have used this drug during the last 3 months of pregnancy may develop feeding difficulties, breathing problems, seizures, muscle stiffness, or constant crying. If you notice any of these symptoms in your baby, notify the doctor immediately.

Tell your doctor if you are planning to become pregnant, or think you may be pregnant.
This drug passes into breast milk and may have devastating effects on a nursing baby. Consult your doctor before breast-feeding.

Effexor Dosage

Take this medication orally as directed by your doctor, usually 2 to 3 times daily with food.
Dosage is usually based on your medical condition and response to treatment. Follow all instructions given by your doctor carefully. Take this medication religiously to get the most from it.
It is important to continue with the prescription even if you feel well.
Do not stop taking this medication without consulting your doctor. Some symptoms may become worse if you stop suddenly. It may take several weeks to feel the effects of this medication. Tell your doctor if your condition doesn’t improve or worsens.
Special care should be taken when administering this medication to children. Therefore, consult your pediatrician regarding the use of this medicine in children.


If you or someone you know overdoses on this drug, call emergency services immediately. Overdose symptoms are: severe drowsiness, seizures, fast/irregular heartbeat.

Missed dose

If you miss a dose, take it as you remember. If it is close to your next normal dose, take only that dose. Do not take double doses to make up for the missed one.

Effexor Side Effects

Side effects of effexor xr that you should report to your doctor immediately are:
Allergic reactions like skin rash, itching or hives, swelling of the face, lips, or tongue
Breathing problems
Changes in vision (such as seeing rainbows around lights at night).
Suicidal thoughts or other mood changes
Trouble passing urine or change in the amount of urine
Unusual bleeding or bruising
Black/bloody stools
Persistent cough
Severe/pounding headache
Shortness of breath
Vomit that looks like coffee grounds
Eye pain/swelling/redness
Effexor xr Side effects that usually do not require medical attention (report to your doctor if they continue or are bothersome)
change in sex drive or performance
increased sweating
loss of appetite
weight loss

This drug may raise your blood pressure. Check your blood pressure daily and inform your doctor if it’s high.

This medication can increase serotonin and rarely cause a condition called serotonin syndrome/toxicity. The risk increases if you are also taking other drugs that increase serotonin, so inform your doctor of all the drugs you take.

If you notice other side effects not listed above, contact your doctor immediately.


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