Effexor Side Effects

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Effexor Review Questions and Answers

Trade Name:  Effexor
Generic Names:  Venlafaxine
What are some of the uncommon the Effexor side effects?
The least common side effects of Effexor include hyponatremia, mania, seizures, suicide, and interference with cognitive functioning.
What is the mechanism of Effexor?
Effexor potentiates the activity of serotonin in the central nervous system by preventing the reuptake of serotonin. This class medications is known as an SSRI. It also weakly inhibits dopamine reuptake in the CNS.
Is Effexor safe in pregnancy?
Effexor has been given a pregnancy category C. This means that in animal reproduction studies, Effexor has been shown to have adverse effects when administered at doses > human therapeutic doses.
Is Effexor found in breast milk?
 Yes, Effexor is excreted in breast milk.
How is Effexor metabolized?
Effexor is metabolized by the liver and excreted by the kidneys. Of Dosage estimates are indicated in patients with liver and renal dysfunction.
 Adverse events seen in more than 2% of the people taking Effexor:
Gastrointestinal Nausea 37%
Constipation 15%
Anorexia 11%
Diarrhea 8%
Vomiting 6%
Dyspepsia 5%
Flatulence 3%
Neurological Somnolence 23%
Dry mouth 22%
Dizziness 19%
Insomnia 18%
Nervousness 13%
Anxiety 6%
Tremor 5%
Abnormal dreams 4%
Hypertonia 3%
Paresthesia 3%
Libido decreased 2%
Agitation 2%
Confusion 2%
Thinking abnormal 2%
Depersonalization 1%
Depression 1%
Urinary retention 1%
Twitching 1%
Blurred vision 6%
Taste perversion 2%
Tinnitus 2%
Mydriasis 2%
General Headache 25%
Asthenia 12%
Infection 6%
Chills 3%
Chest pain 2%
Trauma 2%
Weight loss 1%
Genitourinary Abnormal ejaculation/orgasm 12%
Impotence 6%
Urinary frequency 3%
Urination impaired 2%
Orgasm disturbance 2%
Cardiovascular Vasodilatation 4%
Increased blood pressure/hypertension 2%
Tachycardia 2%
Postural hypotension 1%
Dermatologic Sweating 12%
Rash 3%
Pruritus 1%