Indications 

Effexor is a medication prescribed by a doctor for treating depression, and it may be used for other conditions as well. 

Effexor is classified as a serotonin-norepinephrine reuptake inhibitor (SNRI), which helps to restore the balance of natural substances in the brain, including serotonin and norepinephrine.  

This restoration of balance can improve mood and alleviate certain mood disorders. 

Uses and Dosage 

Effexor should be used as directed by your doctor, and the label on the medicine should be checked for exact dosing instructions. An extra patient information sheet, called a Medication Guide, is also provided and should be read carefully each time Effexor is refilled. 

The medication should be taken by mouth with food, and at the same time each day to ensure best results. Even if feeling well, Effexor should be continued and no doses should be missed. 

Do not suddenly stop taking Effexor without checking with your doctor first. Doing so may increase the risk of side effects, such as mental or mood changes, numbness or tingling of the skin, dizziness, confusion, headache, increased sweating, diarrhea, nausea, vomiting, trouble sleeping, or unusual tiredness. If stopping Effexor becomes necessary, your doctor may need to gradually lower your dose. 

If a dose is missed, take it as soon as possible. If it is almost time for the next dose, skip the missed one and return to the regular dosing schedule. Do not take two doses at once. 

Any questions about how to use Effexor should be addressed with your healthcare provider. 

Side Effects 

Effexor (venlafaxine) is associated with some common side effects. Here are some things to keep in mind: 

Contact your doctor if side effects don’t improve or become bothersome. 

The most common side effects include:  

• Constipation 
• Diarrhea 
• Drowsiness 
• Fatigue 
• Headache 
• Heartburn 
• Loss of appetite 
• Nausea 
• Sexual side effects 
• Vomiting 

Side effects often improve over the first week or two as you continue taking the medication. 

Call your doctor if your symptoms become severe or persistent. 

Effexor may cause drowsiness when you start taking it, but this effect usually goes away or improves after a week or two. 

Some people may also experience insomnia or nightmares. 

Over time, you may notice improvements in mood and increased energy levels. 

Caution 

Effexor may cause drowsiness, dizziness, or blurred vision. These effects may worsen if used with alcohol or certain medications. Hence, use Effexor cautiously and avoid driving or any hazardous activity until you know how it affects you.  

Avoid alcohol consumption while taking Effexor. Please consult your doctor before taking any medicine that may cause drowsiness (e.g., sleep aids, muscle relaxants) with Effexor as it may add to their effects. Several weeks may pass before your symptoms improve.  

Do not exceed the recommended dose or use the medication for longer than prescribed without consulting your doctor.  

Children, teenagers, and young adults taking Effexor are at a higher risk of developing suicidal thoughts or actions. Therefore, all patients taking Effexor should be closely monitored.  

Contact your doctor immediately if new, worsened, or sudden symptoms such as depression, anxiety, restlessness, or unusual mood or behavior changes occur. 

Contact your doctor right away if you experience any signs of suicidal thoughts or actions.  

Effexor may cause serotonin syndrome, a potentially fatal syndrome, especially if used with other medicines such as “triptans,” MAOIs, SSRIs. Symptoms may include agitation, confusion, hallucinations, coma, fever, fast or irregular heartbeat, tremor, excessive sweating, and nausea, vomiting, or diarrhea. If you experience any of these symptoms, contact your doctor immediately.