Kidney function: Kidney disease or reduced kidney function may cause this medication to build up in the body, causing side effects. If you have kidney disease or reduced kidney function, discuss with your doctor how this medication may affect your medical condition, how your medical condition may affect the dosing and effectiveness of this medication, and whether any special monitoring is needed.
Liver function: Liver disease or reduced liver function may cause this medication to build up in the body, causing side effects. If you have liver problems, discuss with your doctor how this medication may affect your medical condition, how your medical condition may affect the dosing and effectiveness of this medication, and whether any special monitoring is needed.
Your doctor may want to test your liver function regularly with blood tests while you are taking this medication. If you experience symptoms of liver problems such as fatigue, feeling unwell, loss of appetite, nausea, yellowing of the skin or whites of the eyes, dark urine, pale stools, abdominal pain or swelling, and itchy skin, contact your doctor immediately. People with a history of bipolar disorder should be closely monitored by their doctor while taking this medication. Neuroleptic malignant syndrome NMS : Venlafaxine can rarely cause a potentially fatal syndrome known as neuroleptic malignant syndrome NMS.
If you notice the symptoms of NMS such as high fever, muscle stiffness, confusion or loss of consciousness, sweating, racing or irregular heartbeat, or fainting, get immediate medical attention. Seizures: If you have a history of seizures, discuss with your doctor how this medication may affect your medical condition, how your medical condition may affect the dosing and effectiveness of this medication, and whether any special monitoring is needed.
Serotonin syndrome: This medication may cause a potentially life-threatening condition called serotonin syndrome, especially when used with other medications that increase serotonin levels e.
If you experience symptoms of serotonin syndrome such as agitation, hallucinations, fast heart rate, fever, lack of coordination, nausea, vomiting, and diarrhea, get immediate medical attention. Stopping the medication: Stopping this medication suddenly may lead to side effects. If you are thinking of stopping this medication, check with your doctor first.
When stopping venlafaxine treatment after more than one week, it is recommended that the dose of the medication be reduced gradually to prevent symptoms such as anxiety, agitation, confusion, diarrhea, dizziness, dry mouth, fatigue, headache, nausea, loss of appetite, nervousness, sleep disturbances, sweating, and vomiting. Pregnancy: Newborns whose mothers take medications such as venlafaxine during the third trimester of pregnancy may experience complications that require prolonged hospitalization.
These complications normally resolve over time. This medication should not be used during pregnancy unless the benefits outweigh the risks. If you become pregnant while taking this medication, contact your doctor immediately. Breast-feeding: This medication passes into breast milk.
If you are a breast-feeding mother and are taking venlafaxine, it may affect your baby. Talk to your doctor about whether you should continue breast-feeding. Children: The safety and effectiveness of this medication have not been established for children under 18 years old. There have been reports that using this and similar medications for children below the age of 18 may cause behavioural and emotional changes, such as suicidal thoughts and behaviour.
If you are taking any of these medications, speak with your doctor or pharmacist. Depending on your specific circumstances, your doctor may want you to:. An interaction between two medications does not always mean that you must stop taking one of them. Speak to your doctor about how any drug interactions are being managed or should be managed. Medications other than those listed above may interact with this medication. Tell your doctor or prescriber about all prescription, over-the-counter non-prescription , and herbal medications you are taking.
Also tell them about any supplements you take. Since caffeine, alcohol, the nicotine from cigarettes, or street drugs can affect the action of many medications, you should let your prescriber know if you use them. All material copyright MediResource Inc. Terms and conditions of use. The contents herein are for informational purposes only. Always seek the advice of your physician or other qualified health provider with any questions you may have regarding a medical condition.
Source: www. About this Medication. How does this medication work? If you have an allergic reaction, call your doctor or local poison control center right away. If your symptoms are severe, call or go to the nearest emergency room.
Taking it again could be fatal cause death. Do not drink alcohol with venlafaxine. Drinking alcohol raises your risk of sleepiness from venlafaxine.
This may affect your ability to make decisions, think clearly, and react quickly. If you drink alcohol, talk to your doctor. For people with liver disease: If you have a history of liver disease, your liver may not process this drug as quickly as it should. This could lead to a buildup of this drug in your body. Your doctor may start you on a reduced dosage. If they increase your dosage later, they will monitor you closely. For people with kidney disease: If you have kidney disease or a history of kidney disease, you may not be able to clear this drug from your body well.
This may increase the levels of venlafaxine in your body. This can cause more side effects. Your doctor may start you on a low dosage and monitor you closely if they increase your dosage.
For people with hyperthyroidism: Hyperthyroidism can increase your heart rate. Venlafaxine can also increase your heart rate. If you have hyperthyroidism and take venlafaxine, your heart rate may increase to a dangerous level. You are especially at risk if you take venlafaxine doses greater than mg per day. For people with a history of seizures: Venlafaxine raises your risk of seizures. If you have a seizure, stop taking venlafaxine and call your doctor right away. For people with increased eye pressure glaucoma : Venlafaxine can widen your pupils and block the flow of fluid in your eye.
These effects can increase the pressure in your eyes. People with a history of increased eye pressure or glaucoma should have their eye pressure checked regularly while taking venlafaxine. Do not take venlafaxine if you have uncontrolled angle-closure glaucoma.
For pregnant women: Venlafaxine is a category C pregnancy drug. That means two things:. This drug should only be used if the potential benefit justifies the potential risk to the fetus. Call your doctor right away if you become pregnant while taking this drug.
For women who are breastfeeding: Venlafaxine may pass into breast milk and cause side effects in a child who is breastfed. Talk to your doctor about breastfeeding your child. You may need to decide whether to stop breastfeeding or stop taking this medication. For seniors: The kidneys of older adults may not work as well as they used to. This can cause your body to process drugs more slowly.
As a result, more of a drug stays in your body for a longer time. This raises your risk of side effects. Older adults may be at higher risk than younger people for low sodium levels in their blood when taking venlafaxine. For children: This drug should not be used in people younger than 18 years of age. All possible dosages and drug forms may not be included here.
Your dosage, drug form, and how often you take the drug will depend on:. People with liver problems: People with mild to moderate liver problems should take about half of the typical dose. People with severe liver disease or cirrhosis may need an even lower dosage.
Your doctor can tell you more. People who are on dialysis should take half of the typical dosage. However, because drugs affect each person differently, we cannot guarantee that this list includes all possible dosages. Always to speak with your doctor or pharmacist about dosages that are right for you. Venlafaxine oral tablet is used for long-term treatment. Do not stop venlafaxine without talking to your doctor. Stopping venlafaxine too quickly can cause serious symptoms such as:.
If this happens, your doctor may have you start taking venlafaxine again and decrease your dosage slowly. For this drug to work well, a certain amount needs to be in your body at all times. If you take too much: You could have dangerous levels of the drug in your body. Cannabis with venlafaxine can give you a fast heartbeat. Cannabis can also make drowsiness worse with venlafaxine, especially in people who have just started taking it. Methadone can make sleepiness worse with venlafaxine.
It can be potentially dangerous to take venlafaxine with:. Venlafaxine has not been properly tested with recreational drugs. Talk to your doctor if you think you might take any while taking venlafaxine. Page last reviewed: 11 December Next review due: 11 December Venlafaxine On this page About venlafaxine Key facts Who can and can't take venlafaxine How and when to take it Side effects How to cope with side effects Pregnancy and breastfeeding Cautions with other medicines Common questions.
About venlafaxine Venlafaxine is a type of antidepressant often used to treat depression. Help us improve our website Can you answer a quick question about your visit today? It usually takes 4 to 6 weeks for venlafaxine to work. Side effects such as feeling sick, headaches, sweating, and dry mouth are common.
They are usually mild and go away after a couple of weeks. If you and your doctor decide to take you off venlafaxine, your doctor will probably recommend reducing your dose gradually to help prevent extra side effects. Venlafaxine has lots of different brand names including Efexor XL. Check with your doctor before starting to take venlafaxine if you: have had an allergic reaction to venlafaxine or any other medicines in the past have a heart problem - as venlafaxine can speed up or change your heartbeat are trying to become pregnant, are already pregnant or you are breastfeeding have an eye problem called glaucoma because venlafaxine can increase the pressure in your eye have epilepsy or are having electroconvulsive treatment - venlafaxine may increase your risk of having a seizure If you have diabetes , venlafaxine can make it more difficult to keep your blood sugar stable.
How much to take The usual starting dose of venlafaxine is 75mg a day. What if I forget to take it? What if I take too much? Urgent advice: Call your doctor straight away if:. Common side effects These side effects happen in more than 1 in people. Keep taking the medicine, but tell your doctor or pharmacist if these side effects bother you or don't go away: feeling sick headaches sweating dry mouth trouble sleeping feeling dizzy feeling sleepy constipation Serious side effects It is not common, but some people less than 1 in may have serious side effects when taking venlafaxine.
Information: You can report any suspected side effect to the UK safety scheme. What to do about: feeling sick - try taking venlafaxine with or after food.
It may also help if you avoid rich or spicy food. If it carries on, tell your doctor. Do not drink too much alcohol. Ask your pharmacist to recommend a painkiller. Headaches should usually go away after the first week of taking venlafaxine. Talk to your doctor if they last longer than a week or are severe. If you begin to feel dizzy, lie down so that you don't faint, then sit until you feel better.
Do not drive or use tools or machines if you feel dizzy or if you just feel a bit shaky. Cut down the amount of alcohol you drink as this will make you feel more tired. If this symptom does not go away after a week or 2, ask your doctor for advice. Try to exercise , for example, by going for a daily walk or run. If this doesn't help, talk to your pharmacist or doctor. Watch this short video about how to treat constipation.
Venlafaxine and breastfeeding If your doctor or health visitor says your baby is healthy, venlafaxine can be used during breastfeeding. Non-urgent advice: Tell your doctor if you're:.
Tell your doctor if you're taking these medicines before you start venlafaxine : any medicines that affect your heartbeat - as venlafaxine can speed up or change your heartbeat. Some rarely used antidepressants can interact with venlafaxine to cause very high blood pressure even when they have been stopped for a few weeks.
Mixing venlafaxine with herbal remedies and supplements Do not take the herbal remedy for depression, St John's wort, while you are being treated with venlafaxine as it will increase your risk of side effects. Important Tell your doctor or pharmacist if you are taking any other medicines, including herbal remedies, vitamins or supplements. How does venlafaxine work? When will I feel better? How will it make me feel? How long will I take it for? Is it safe to take it for a long time?
For most people, venlafaxine is safe to take for a long time. How do I come off venlafaxine? These include: dizziness feeling sick numbness or tingling in the hands or feet trouble sleeping feeling agitated or anxious headaches shaking Important Do not stop taking venlafaxine suddenly, or without talking to your doctor first.
Is venlafaxine better than other antidepressants? Are there other treatments that will help? Other potential treatments for depression include: talking therapy such as cognitive behavioural therapy exercise programmes help to get a good night's rest if sleep is a problem Other potential treatments for anxiety include: talking therapy such as cognitive behavioural therapy joining a self-help group using relaxation techniques Choosing a treatment that's most suitable for you depends on: how long you've had depression or anxiety and your symptoms whether previous treatment has worked how likely you are to stick with your treatment the potential side effects your preferences and priorities If you're interested in any of these treatments, talk to your doctor.
Will it affect my fertility? Is there any food or drink I need to avoid?
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