What is the average dosage for Effexor?

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What is the average dosage for Effexor?
Always check the dosage carefully when your GP prescribes anti-depressants. (DimitrovoPhtography/iStock/Getty Images)

Effexor is the brand name for venlafaxine, a prescription anti-depressant that is also used to treat conditions such as generalised anxiety disorder. Though each patient responds differently to Effexor, there are some established average dosage guidelines that doctors typically follow.

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Available strengths

Instant release Effexor tablets range from 25 to 100 mg. Effexor XR, an extended-release capsule, is available in 37.5 mg, 75 mg and 150 mg formulations.

Starting dose

The average starting dose for depression, general anxiety disorder and social anxiety disorder is 75 mg, though sometimes doctors have the patient take 37.5 mg for a few days to allow the body to adjust to the medication.

General dosage

The average general Effexor dosage ranges from 125 to 150 mg per day. Generic instant and extended-release tablets and capsules are available.

Maximum dosage

Doctors rarely prescribe more than 375 mg of Effexor each day. If the drug does not work, the patient will likely be switched to a different anti-depressant.

Potential side effects

Side effects that can occur from using either venlafaxine formulation include drowsiness, headaches, nightmares, nausea, gas and dry mouth.

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