March 29, 2017
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Effexor

"There is no difference in response or remission rates produced by second-generation antidepressants and those achieved by cognitive-behavioral therapies (CBT) in the treatment of major depressive disorder (MDD), a systematic review and meta-analy"...

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Effexor

EFFEXOR
(venlafaxine) Tablet, for Oral Administration




WARNING

Suicidality And Antidepressant Drugs

Antidepressants increased the risk compared to placebo of suicidal thinking and behavior (suicidality) in children, adolescents, and young adults in short-term studies of Major Depressive Disorder (MDD) and other psychiatric disorders. Anyone considering the use of venlafaxine tablets, USP or any other antidepressant in a child, adolescent, or young adult must balance this risk with the clinical need. Short-term studies did not show an increase in the risk of suicidality with antidepressants compared to placebo in adults beyond age 24; there was a reduction in risk with antidepressants compared to placebo in adults aged 65 and older. Depression and certain other psychiatric disorders are themselves associated with increases in the risk of suicide. Patients of all ages who are started on antidepressant therapy should be monitored appropriately and observed closely for clinical worsening, suicidality, or unusual changes in behavior. Families and caregivers should be advised of the need for close observation and communication with the prescriber. Venlafaxine tablets, USP is not approved for use in pediatric patients. (See WARNINGS: Clinical Worsening and Suicide Risk, PATIENT INFORMATION, and PRECAUTIONS: Pediatric Use).

DRUG DESCRIPTION

Venlafaxine tablets, USP is a structurally novel antidepressant for oral administration. It is designated (R/S)-1-[2-(dimethylamino)-1-(4-methoxyphenyl)ethyl] cyclohexanol hydrochloride or (±)-1-[α- [(dimethyl-amino)methyl]-p-methoxybenzyl]cyclohexanol hydrochloride and has the empirical formula of C17H27NO2 HCl. Its molecular weight is 313.87. The structural formula is shown below.

EFFEXOR (venlafaxine) Structural Formula Illustration

Venlafaxine hydrochloride is a white to off-white crystalline solid with a solubility of 572 mg/mL in water (adjusted to ionic strength of 0.2 M with sodium chloride). Its octanol:water (0.2 M sodium chloride) partition coefficient is 0.43.

Compressed tablets contain venlafaxine hydrochloride, USP equivalent to 25 mg, 37.5 mg, 50 mg, 75 mg, or 100 mg of venlafaxine base and the following inactive ingredients: microcrystalline cellulose, lactose monohydrate, pregelatinized starch, sodium starch glycolate, iron oxide red, iron oxide yellow, colloidal silicon dioxide, and magnesium stearate.

What are the possible side effects of venlafaxine (Effexor, Effexor XR)?

Get emergency medical help if you have any of these signs of an allergic reaction: skin rash or hives; difficulty breathing; swelling of your face, lips, tongue, or throat.

Report any new or worsening symptoms to your doctor, such as: mood or behavior changes, anxiety, panic attacks, trouble sleeping, or if you feel impulsive, irritable, agitated, hostile, aggressive, restless, hyperactive (mentally or physically), more depressed, or have thoughts about suicide or hurting yourself.

Call your doctor at once if you have a serious side effect such...

Read All Potential Side Effects and See Pictures of Effexor »

What are the precautions when taking venlafaxine hydrochloride (Effexor)?

Before taking venlafaxine, tell your doctor or pharmacist if you are allergic to it; or to desvenlafaxine; or if you have any other allergies. This product may contain inactive ingredients, which can cause allergic reactions or other problems. Talk to your pharmacist for more details.

Before using this medication, tell your doctor or pharmacist your medical history, especially of: bleeding problems, personal or family history of glaucoma (angle-closure type), high blood pressure, heart problems (such as heart failure, previous heart attack), high cholesterol, kidney disease, liver disease, seizure disorder, thyroid disease.

This drug may make you dizzy or drowsy or cause blurred vision. Do not drive, use machinery, or do any activity that requires alertness or clear vision...

Read All Potential Precautions of Effexor »

Last reviewed on RxList: 9/9/2016
This monograph has been modified to include the generic and brand name in many instances.

Effexor - User Reviews

Effexor User Reviews

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Report Problems to the Food and Drug Administration

 

You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.


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