Venlafaxine is a stimulant in a gathering of medications called specific serotonin and norepinephrine reuptake inhibitors (SSNRIs). Venlafaxine influences chemicals in the mind that might be lopsided in individuals with sadness.

Generally reported symptoms of venlafaxine include: shortcoming, languor, clogging, anorgasmia, queasiness, apprehension, a sleeping disorder, unsteadiness, cerebral pain, postponed discharge, xerostomia, diminished longing, anorexia, and diaphoresis. Other symptoms include: hypertension, ineptitude, tension, stomach torment, tremor, obscured vision, visual unsettling influence, heaving, weight reduction, the runs, expanded serum cholesterol, dyspepsia, pharyngitis, vasodilatation, diminished moxie, yawning, expanded dream movement, tooting, and irregular dreams.

Severity: Major
If any of the subsequent side effects occur while taking venlafaxine, check with your doctor immediately:

More common:
• High blood pressure
• lack or loss of strength
• severe headache
• sweating

Less common:
• Blurred vision
• chest pain
• fast or irregular heartbeat
• mood or mental changes
• ringing or buzzing in the ears
• suicidal thoughts

Rare:
• Actions that are out of control
• convulsions
• high fever
• high or low blood pressure
• irritability
• itching or skin rash
• lightheadedness or fainting, especially when getting up suddenly from a sitting or lying position
• menstrual changes
• nervousness
• problems with urinating or holding urine
• severe muscle stiffness
• talking, feeling, and acting with excitement that you cannot control
• trouble breathing
• unusually pale skin

Incidence not known:
• Agitation
• bloody, black, or tarry stools
• bloody stool or urine
• confusion
• dark urine
• decreased frequency or amount of urine
• diarrhea
• drowsiness
• fever
• general feeling of tiredness or weakness
• headache
• increased thirst
• light-colored stools
• muscle cramps, spasms, or pain
• nausea or vomiting
• nosebleeds
• overactive reflexes
• poor coordination
• red or purple spots on skin
• restlessness
• shivering
• stomach pain on upper right side
• swelling of the face, lower legs, ankles, hands, or fingers
• trembling or shaking that is hard to control
• twitching
• unusual bruising
• unusual tiredness or weakness
• vomiting of blood or material that looks like coffee grounds
• yellow eyes or skin