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Venlafaxine
Investigational uses
Contraindications
Adverse effects
Common side effects
Rare side-effects
Dose dependency
Available forms
Overdose
Mechanism of action
Tricyclic antidepressants
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Off-label / investigational uses

Many doctors are starting to prescribe venlafaxine "off label" for the treatment of diabetic neuropathy (in a similar manner to duloxetine) and migraine prophylaxis (in some people, however, venlafaxine can exacerbate or cause migraines). Studies have shown venlafaxine's effectiveness for these conditions. It has also been found to reduce the severity of 'hot-flashes' in menopausal women.

Substantial weight loss in patients with major depression, generalized anxiety disorder, and social phobia has been noted, but the manufacturer does not recommend use as an anorectic either alone or in combination with phentermine or other amphetamine-like drugs. Venlafaxine hydrochloride is in the phenylthylamine class of modern chemicals, which includes amphetamine, methylendioxymethamphetamine (MDMA), and methamphetamine. This chemical structure likely lends to its activating properties, however some patients find Venlafaxine highly sedating despite its more common stimulatory effects.

Venlafaxine is not approved for the treatment of depressive phases of bipolar disorder; this has some potential danger as venlafaxine can induce mania, mixed states, rapid cycling and/or psychosis in some bipolar patients, particularly if they are not also being treated with a mood stabilizer. Venlafaxine is perhaps one of the most likely of all modern antidepressants to trigger manic and hypomanic states.

Due to its action on both the serotoninergic and adrenergic systems, Venlafaxine is also used as a treatment to reduce episodes of Cataplexy, a form of muscle weakness, in patients with the sleep disorder Narcolepsy.

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