Description and Brand Names

Drug information provided by: Micromedex

US Brand Name

  1. Effexor
  2. Effexor-XR

Descriptions


Venlafaxine is used to treat depression. It is also used to treat general anxiety disorder, social anxiety disorder, and panic disorder. Venlafaxine belongs to a group of medicines known as serotonin and norepinephrine reuptake inhibitors (SNRI). These medicines are thought to work by increasing the activity of a chemical called serotonin in the brain.

This medicine is available only with your doctor's prescription.

Once a medicine has been approved for marketing for a certain use, experience may show that it is also useful for other medical problems. Although this use is not included in product labeling, venlafaxine is used in certain patients with the following medical condition:

  • Hot flashes or flushing.

This product is available in the following dosage forms:

  • Capsule, Extended Release
  • Tablet, Extended Release
  • Tablet

Before Using

In deciding to use a medicine, the risks of taking the medicine must be weighed against the good it will do. This is a decision you and your doctor will make. For this medicine, the following should be considered:

Allergies

Tell your doctor if you have ever had any unusual or allergic reaction to this medicine or any other medicines. Also tell your health care professional if you have any other types of allergies, such as to foods, dyes, preservatives, or animals. For non-prescription products, read the label or package ingredients carefully.

Pediatric

Appropriate studies performed to date have not demonstrated any benefit to using venlafaxine in children. Studies have shown that some children, teenagers, and young adults think about suicide or attempt suicide when taking the medicine. Because of this toxicity, use in children is not recommended.

Geriatric

Appropriate studies performed to date have not demonstrated geriatric-specific problems that would limit the usefulness of venlafaxine in the elderly. However, elderly patients might be more sensitive to the effects of this medicine which may cause low levels of sodium in the blood. Elderly patients could also have age-related liver or kidney problems, which may require caution and an adjustment in the dose for patients taking venlafaxine.

Pregnancy

Information about this venlafaxine-oral-route
Pregnancy Category Explanation
All Trimesters C Animal studies have shown an adverse effect and there are no adequate studies in pregnant women OR no animal studies have been conducted and there are no adequate studies in pregnant women.

Breastfeeding

There are no adequate studies in women for determining infant risk when using this medication during breastfeeding. Weigh the potential benefits against the potential risks before taking this medication while breastfeeding.

Drug Interactions

Although certain medicines should not be used together at all, in other cases two different medicines may be used together even if an interaction might occur. In these cases, your doctor may want to change the dose, or other precautions may be necessary. When you are taking this medicine, it is especially important that your healthcare professional know if you are taking any of the medicines listed below. The following interactions have been selected on the basis of their potential significance and are not necessarily all-inclusive.

Using this medicine with any of the following medicines is not recommended. Your doctor may decide not to treat you with this medication or change some of the other medicines you take.

  • Amifampridine
  • Furazolidone
  • Iproniazid
  • Isocarboxazid
  • Linezolid
  • Methylene Blue
  • Metoclopramide
  • Moclobemide
  • Nialamide
  • Pargyline
  • Phenelzine
  • Piperaquine
  • Procarbazine
  • Rasagiline
  • Selegiline
  • Toloxatone
  • Tranylcypromine
  • Trifluoperazine

Using this medicine with any of the following medicines is usually not recommended, but may be required in some cases. If both medicines are prescribed together, your doctor may change the dose or how often you use one or both of the medicines.

  • Aceclofenac
  • Acemetacin
  • Acenocoumarol
  • Almotriptan
  • Amitriptyline
  • Amoxapine
  • Amoxicillin
  • Amtolmetin Guacil
  • Anagrelide
  • Ancrod
  • Anisindione
  • Antithrombin III Human
  • Apixaban
  • Aspirin
  • Atazanavir
  • Bivalirudin
  • Bromfenac
  • Bufexamac
  • Bupropion
  • Celecoxib
  • Choline Salicylate
  • Cilostazol
  • Clarithromycin
  • Clomipramine
  • Clonixin
  • Clopidogrel
  • Crizotinib
  • Cyclobenzaprine
  • Dabrafenib
  • Danaparoid
  • Defibrotide
  • Delamanid
  • Dermatan Sulfate
  • Desipramine
  • Desirudin
  • Desvenlafaxine
  • Dexfenfluramine
  • Dexibuprofen
  • Dexketoprofen
  • Dextroamphetamine
  • Dextromethorphan
  • Dibenzepin
  • Diclofenac
  • Dicumarol
  • Diflunisal
  • Dipyridamole
  • Dipyrone
  • Dothiepin
  • Doxepin
  • Duloxetine
  • Eletriptan
  • Entacapone
  • Epoprostenol
  • Eptifibatide
  • Escitalopram
  • Etodolac
  • Etofenamate
  • Etoricoxib
  • Felbinac
  • Fenfluramine
  • Fenoprofen
  • Fentanyl
  • Fepradinol
  • Feprazone
  • Floctafenine
  • Flufenamic Acid
  • Fluoxetine
  • Flurbiprofen
  • Fondaparinux
  • Frovatriptan
  • Haloperidol
  • Heparin
  • Ibuprofen
  • Ibuprofen Lysine
  • Iloprost
  • Imipramine
  • Indomethacin
  • Iobenguane I 123
  • Itraconazole
  • Ivabradine
  • Jujube
  • Ketoconazole
  • Ketoprofen
  • Ketorolac
  • Lamifiban
  • Levomilnacipran
  • Lexipafant
  • Lorcaserin
  • Lornoxicam
  • Loxoprofen
  • Lumiracoxib
  • Meclofenamate
  • Mefenamic Acid
  • Meloxicam
  • Meperidine
  • Milnacipran
  • Mirtazapine
  • Morniflumate
  • Nabumetone
  • Naproxen
  • Naratriptan
  • Nefazodone
  • Nelfinavir
  • Nepafenac
  • Niflumic Acid
  • Nimesulide
  • Nortriptyline
  • Ondansetron
  • Oxaprozin
  • Oxyphenbutazone
  • Parecoxib
  • Pazopanib
  • Pentosan Polysulfate Sodium
  • Phenindione
  • Phenprocoumon
  • Phenylbutazone
  • Piketoprofen
  • Piroxicam
  • Pranoprofen
  • Proglumetacin
  • Propyphenazone
  • Proquazone
  • Protriptyline
  • Quetiapine
  • Ritonavir
  • Rizatriptan
  • Rofecoxib
  • Salicylic Acid
  • Salsalate
  • Saquinavir
  • Sevoflurane
  • Sibrafiban
  • Sibutramine
  • Sodium Salicylate
  • Sulfinpyrazone
  • Sulindac
  • Sulodexide
  • Sumatriptan
  • Tapentadol
  • Telithromycin
  • Tenoxicam
  • Tiaprofenic Acid
  • Ticlopidine
  • Tirofiban
  • Tolfenamic Acid
  • Tolmetin
  • Toremifene
  • Tramadol
  • Trazodone
  • Trimipramine
  • Valdecoxib
  • Vandetanib
  • Vasopressin
  • Vemurafenib
  • Vilazodone
  • Vinflunine
  • Vortioxetine
  • Warfarin
  • Xemilofiban
  • Zolmitriptan

Using this medicine with any of the following medicines may cause an increased risk of certain side effects, but using both drugs may be the best treatment for you. If both medicines are prescribed together, your doctor may change the dose or how often you use one or both of the medicines.

  • Ginkgo
  • Metoprolol
  • St John's Wort
  • Zolpidem

Other Interactions

Certain medicines should not be used at or around the time of eating food or eating certain types of food since interactions may occur. Using alcohol or tobacco with certain medicines may also cause interactions to occur. The following interactions have been selected on the basis of their potential significance and are not necessarily all-inclusive.

Other Medical Problems

The presence of other medical problems may affect the use of this medicine. Make sure you tell your doctor if you have any other medical problems, especially:

  • Bipolar disorder (mood disorder with mania and depression), or risk of or
  • Bleeding problems or
  • Glaucoma, angle-closure or
  • Hypercholesterolemia (high cholesterol in the blood) or
  • Hypertension (high blood pressure) or
  • Hyponatremia (low sodium in the blood) or
  • Insomnia or
  • Interstitial lung disease, history of or
  • Mania, history of or
  • Seizures, history of or
  • Tachycardia (fast heart rate)—Use with caution. May make these conditions worse.
  • Kidney disease or
  • Liver disease—Use with caution. The effects may be increased because of slower removal of the medicine from the body.

Proper Use

Take this medicine only as directed by your doctor to benefit your condition as much as possible. Do not take more of it, do not take it more often, and do not take it for a longer time than your doctor ordered.

This medicine should come with a Medication Guide. It is very important that you read and understand this information. Be sure to ask your doctor about anything you do not understand.

Take the extended-release capsule or tablet with food either in the morning or evening at about the same time each day. If your doctor tells you to take the medicine a certain way, take it exactly as directed.

Swallow the extended-release capsule whole with fluid. Do not crush, chew, divide, or place the capsule in a liquid.

If you are unable to swallow the extended-release capsule, open it and pour the medicine on a spoonful of applesauce. Swallow the mixture of applesauce and medicine right away without chewing. Drink a glass of water so all of the medicine is swallowed.

Dosing

The dose of this medicine will be different for different patients. Follow your doctor's orders or the directions on the label. The following information includes only the average doses of this medicine. If your dose is different, do not change it unless your doctor tells you to do so.

The amount of medicine that you take depends on the strength of the medicine. Also, the number of doses you take each day, the time allowed between doses, and the length of time you take the medicine depend on the medical problem for which you are using the medicine.

  • For oral dosage form (extended-release capsules, tablets):
    • For depression:
      • Adults—At first, 75 milligrams (mg) per day, taken as one dose in the morning or evening. Your doctor may adjust your dose as needed. However, the dose is usually not more than 225 mg per day.
      • Children—Use and dose must be determined by your doctor.
    • For generalized anxiety disorder:
      • Adults—At first, 75 milligrams (mg) per day, taken as one dose in the morning or evening. Your doctor may adjust your dose as needed. However, the dose is usually not more than 225 mg per day.
      • Children—Use and dose must be determined by your doctor.
    • For panic disorder
      • Adults—At first, 37.5 milligrams (mg) per day, taken as one dose in the morning or evening. Your doctor may adjust your dose as needed. However, the dose is usually not more than 225 mg per day.
      • Children—Use and dose must be determined by your doctor.
    • For social anxiety disorder:
      • Adults—75 milligrams (mg) per day, taken as one dose in the morning or evening.
      • Children—Use and dose must be determined by your doctor.
  • For oral dosage form (tablets):
    • For depression:
      • Adults—At first, a total of 75 milligrams (mg) per day, divided and taken 2 or 3 times during the day. Your doctor may adjust your dose as needed. However, the dose is usually not more than 225 mg per day.
      • Children—Use and dose must be determined by your doctor.

Missed Dose

If you miss a dose of this medicine, take it as soon as possible. However, if it is almost time for your next dose, skip the missed dose and go back to your regular dosing schedule. Do not double doses.

Storage

Store the medicine in a closed container at room temperature, away from heat, moisture, and direct light. Keep from freezing.

Keep out of the reach of children.

Do not keep outdated medicine or medicine no longer needed.

Ask your healthcare professional how you should dispose of any medicine you do not use.

Precautions

If you will be taking this medicine for a long time, it is very important that your doctor check you at regular visits. This will allow your doctor to see if the medicine is working properly and to decide if you should continue to take it.

Do not take venlafaxine with a monoamine oxidase (MAO) inhibitor (eg, isocarboxazid [Marplan®], phenelzine [Nardil®], selegiline [Eldepryl®], tranylcypromine [Parnate®]). Do not start taking venlafaxine during the 2 weeks after you stop a MAO inhibitor and wait 1 week after stopping venlafaxine before you start taking a MAO inhibitor. If you take them together or do not wait the proper amount of time, you may develop confusion, agitation, restlessness, stomach or intestinal symptoms, a sudden high body temperature, an extremely high blood pressure, or severe convulsions.

Venlafaxine may cause a serious condition called serotonin syndrome if taken together with some medicines. Do not use venlafaxine with buspirone (Buspar®), fentanyl (Abstral®, Duragesic®), linezolid (Zyvox®), lithium (Eskalith®, Lithobid®), methylene blue injection, tryptophan, St. John's wort, or some pain or migraine medicines (eg, rizatriptan, sumatriptan, tramadol, Frova®, Imitrex®, Maxalt®, Relpax®, Ultram®, Zomig®). Check with your doctor first before taking any other medicines with venlafaxine.

For some children, teenagers, and young adults, this medicine can increase thoughts of suicide. Tell your doctor right away if you start to feel more depressed and have thoughts about hurting yourself. Report any unusual thoughts or behaviors that trouble you, especially if they are new or get worse quickly. Make sure the doctor knows if you have trouble sleeping, get upset easily, have a big increase in energy, or start to act reckless. Also tell the doctor if you have sudden or strong feelings, such as feeling nervous, angry, restless, violent, or scared. Let the doctor know if you or anyone in your family has bipolar disorder (manic-depressive) or has tried to commit suicide.

Do not stop taking this medicine without checking first with your doctor. Your doctor may want you to gradually reduce the amount you are taking before stopping it completely. This will decrease the chance of side effects, such as agitation, confusion, headache, irritability, numbness or tingling feeling, restlessness, trouble sleeping, or unusual drowsiness or weakness.

This medicine may cause hyponatremia (low sodium in the blood). This is more common in elderly patients, those who take diuretic medicines, or those who have a low amount of fluid in the body due to severe diarrhea or vomiting. Check with your doctor right away if you have a headache, trouble concentrating, memory problems, confusion, weakness, or feel unsteady when standing.

Venlafaxine may increase your risk for bleeding problems. Make sure your doctor knows if you are also using other medicines that thin the blood, such as aspirin, NSAID pain or arthritis medicines (eg, diclofenac, ibuprofen, naproxen, Advil®, Aleve®, Celebrex®, Voltaren®), or warfarin (Coumadin®, Jantoven®).

Tell your doctor right away if you are having chest discomfort, a cough, or trouble breathing with this medicine. These might be symptoms of a serious lung problem.

Venlafaxine may cause some people to become drowsy or have blurred vision. Make sure you know how you react to this medicine before you drive, use machines, or do anything else that could be dangerous if you are not alert or able to see clearly. It is best to avoid alcohol with venlafaxine.

Before you have any medical tests, tell the medical doctor in charge that you are taking this medicine. The results of some tests may be affected by this medicine.

Do not take other medicines unless they have been discussed with your doctor. This includes prescription or nonprescription (over-the-counter [OTC]) medicines and herbal (eg, St. John's wort) or vitamin supplements.

Side Effects

Along with its needed effects, a medicine may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.

Check with your doctor immediately if any of the following side effects occur:

More common

  1. High blood pressure
  2. lack or loss of strength
  3. severe headache
  4. sweating

Less common

  1. Blurred vision
  2. chest pain
  3. fast or irregular heartbeat
  4. mood or mental changes
  5. ringing or buzzing in the ears
  6. suicidal thoughts

Rare

  1. Actions that are out of control
  2. convulsions
  3. high fever
  4. high or low blood pressure
  5. irritability
  6. itching or skin rash
  7. lightheadedness or fainting, especially when getting up suddenly from a sitting or lying position
  8. menstrual changes
  9. nervousness
  10. problems with urinating or holding urine
  11. severe muscle stiffness
  12. talking, feeling, and acting with excitement that you cannot control
  13. trouble breathing
  14. unusually pale skin

Incidence not known

  1. Agitation
  2. bloody, black, or tarry stools
  3. bloody stool or urine
  4. confusion
  5. dark urine
  6. decreased frequency or amount of urine
  7. diarrhea
  8. drowsiness
  9. fever
  10. general feeling of tiredness or weakness
  11. headache
  12. increased thirst
  13. light-colored stools
  14. muscle cramps, spasms, or pain
  15. nausea or vomiting
  16. nosebleeds
  17. overactive reflexes
  18. poor coordination
  19. red or purple spots on skin
  20. restlessness
  21. shivering
  22. stomach pain on upper right side
  23. swelling of the face, lower legs, ankles, hands, or fingers
  24. trembling or shaking that is hard to control
  25. twitching
  26. unusual bruising
  27. unusual tiredness or weakness
  28. vomiting of blood or material that looks like coffee grounds
  29. yellow eyes or skin

Some side effects may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects. Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about them:

More common

  1. Abnormal dreams
  2. chills
  3. constipation
  4. decrease in sexual desire or ability
  5. diarrhea
  6. drowsiness
  7. dry mouth
  8. heartburn
  9. increased sweating
  10. loss of appetite
  11. nausea
  12. stomach pain or gas
  13. stuffy or runny nose
  14. tingling, burning, or prickly sensations
  15. trembling or shaking
  16. trouble sleeping
  17. unusual tiredness or weakness
  18. vomiting
  19. weight loss

Less common

  1. Change in taste
  2. muscle tension
  3. yawning

Incidence not known

  1. Night sweats

Other side effects not listed may also occur in some patients. If you notice any other effects, check with your healthcare professional.

Call your doctor for medical advice about side effects. You may report side effects to the FDA at 1-800-FDA-1088.