Effexor RX

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Effexor XR? Effexor RX is a common misspelling of Effexor XR.

Oftentimes, drug companies attach XR to the end of a drug name to indicate that it is an extended-release medicine. Wyeth, the manufacturer of Effexor^®, has also produced an extended-release version. There is no Effexor RX.

Effexor XR^® (venlafaxine XR) is used for the treatment of depression and several types of anxiety disorders. Part of a class of drugs called serotonin-norepinephrine reuptake inhibitors (SNRIs), it works by acting on specific chemicals within the brain known as serotonin and norepinephrine. The medicine comes in capsule form and is taken once a day. Common side effects include sweating, constipation, and nausea.

(If you would like to read about Effexor XR, click Effexor XR. This article discusses how Effexor XR works, as well as and how and when to take the medicine and what you should tell your healthcare provider before you begin taking it. You can also click on any of the links in the box to the right for more specific information.)