Lanvexin tablets


  • Active Ingredient: Venlafaxine
  • 150 mg, 75 mg, 37.5 mg
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What is Lanvexin?

The active ingredient of Lanvexin brand is venlafaxine. Venlafaxine is a selective serotonin and norepinephrine reuptake inhibitor (SNRIs) antidepressant. Venlafaxine affects chemicals in the brain that may be unbalanced in people with depression.

Used for

Lanvexin is used to treat diseases such as: Anxiety, Anxiety and Stress, Autism, Bipolar Disorder, Bulimia, Cataplexy, Depression, Dissociative Identity Disorder, Fibromyalgia, Generalized Anxiety Disorder, Hot Flashes, Irritable Bowel Syndrome, Major Depressive Disorder, Migraine, Obsessive Compulsive Disorder, Panic Disorder, Post Traumatic Stress Disorder, Postpartum Depression, Premenstrual Dysphoric Disorder, Social Anxiety Disorder, Somatoform Pain Disorder, Vulvodynia.

Side Effect

Possible side effects of Lanvexin include: stuffy or runny nose; trembling or shaking that is hard to control; diarrhea; itching or skin rash; unusually pale skin.

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2. Key facts

  • It usually takes 4 to 6 weeks for Lanvexin 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 Lanvexin, your doctor will probably recommend reducing your dose gradually to help prevent extra side effects.
  • Lanvexin has lots of different brand names including Efexor XL.

Q: I have taken Effexor XR 150 mg for many years and developed a stubborn skin rash. Testing indicated a drug reaction, so I have been weaning off; 3 weeks of 75 mg and 3 weeks of 37.5 mg. My prescription ended and I have been dizzy for the next week. Is this expected, or could it be something else?

A: I am impressed that you were able to come off of the Effexor (Lanvexin), that is quite a feat! There are a variety of symptoms that go along with withdrawal of a medication, especially those that deal with neurotransmitters so powerfully, as Effexor does. It may take some time for your brain to fully adapt to the lack of this medication. Many times, a prescriber will ramp a patient up on another medication such as Wellbutrin, while tapering off of a strong medication such as Effexor, I am not privy to the plans of your prescriber in this area. However, if the dizziness does continue for another week, I would recommend to most patients that they report it, and not operate any dangerous machinery until it subsides. It is also important to note that you will most likely also be allergic to Pristiq (desLanvexin), so please be aware of this if one of your physicians recommends it as a substitute for the Effexor. For more information, please visit: // Matt Curley, PharmD

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Do not stop taking Lanvexin suddenly, or without talking to your doctor first.

Lanvexin isn't any better or worse than other antidepressants. However, sometimes people respond better to one antidepressant than to another. If you aren't feeling any better after 6 weeks, talk to your doctor.

Antidepressants, including Lanvexin, are just one of several approaches to treating depression or anxiety.

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.

There's no firm evidence to suggest that taking Lanvexin will reduce fertility in men, but it may interfere with the menstrual cycle in women.

Speak to a pharmacist or your doctor if you're trying to get pregnant. They may want to review your treatment.

You can eat and drink normally while taking Lanvexin.

Lanvexin can make you feel less hungry than usual, so you may lose weight when you start taking it. Some people might find they gain weight.

If you start to have problems with your weight while taking Lanvexin, talk to your doctor or pharmacist.

The good effects of Lanvexin may, after a while, improve your sex life as your mood lifts and you become interested in life and relationships again.

Some of the possible negative effects include:

  • men might have problems with getting an erection, or with ejaculating
  • women might have some vaginal bleeding
  • both men and women might find they don't reach orgasm the same way as before
  • you may have a lower sex drive

Sexual side effects usually pass after the first couple of weeks. However, very rarely, they can be long lasting and may not get better even after stopping the medicine.

If these happen and are a problem for you, go back to your doctor to see if there's another treatment you can try.

Lanvexin will not affect contraception including the combined pill or emergency contraception.

Some people can't concentrate properly while they're taking Lanvexin. It might be best to stop driving and cycling for the first few days of treatment until you know how this medicine makes you feel.

You can drink alcohol while taking Lanvexin but it may make you feel sleepy. It might be best to stop drinking alcohol during the first few days of treatment until you see how this medicine affects you.

Cannabis with Lanvexin can give you a fast heartbeat. Cannabis can also make drowsiness worse with Lanvexin, especially in people who have just started taking it.

Methadone can make sleepiness worse with Lanvexin. It can be potentially dangerous to take Lanvexin with:

  • stimulants like MDMA (ecstasy) or cocaine
  • hallucinogens like LSD
  • novel psychoactive substances (which used to be known as legal highs) like mephedrone

Lanvexin and Alcohol

Do not drink alcohol while taking Lanvexin, as alcohol can augment the sleepiness effect of the drug.

Rated Lanvexin for Post-Traumatic stress disorder (PTSD) Report

I started on 37.5 mg about 6 weeks ago. I really enjoy this drug so far. I have had sleep hallucinations since age 14 as a result of anxiety. Since starting this medicine, my symptoms have significantly decreased. I feel calm without a high feeling. A little drowsy after I take this medicine but I take it a couple hours before bed so it’s not too bad.

Coadministration with serotonergic drugs

  • Coadministration with monoamine oxidase inhibitors (MAOIs)
  • Concomitant MAOIs administration within 14 days before initiating Lanvexin or within 7 days after discontinuing Lanvexin
  • Initiation of Lanvexin in patient being treated with linezolid or IV methylene blue

Serotonin and Norepinephrine Reuptake Inhibitors

Lanvexin , desLanvexin, and duloxetine are marketed representatives of antidepressants whose mechanism of action is serotonin and norepinephrine transporter antagonism (at higher doses, paroxetine, usually classified as an SSRI, acts as a serotonin and norepinephrine reuptake inhibitor). Lanvexin, approved for use in adult depression, generalized anxiety disorder, and social phobia, is also a weak inhibitor of dopamine reuptake but has little affinity for other neuroreceptors. Lanvexin is metabolized principally by the cytochrome P-450 2D6 system to O-desmethylLanvexin, also an active serotonin and norepinephrine reuptake inhibitor. The elimination half-lives of Lanvexin and its metabolite are 5 and 11 hours, respectively. Two large-scale, controlled, multicenter FDA pediatric exclusivity trials of Lanvexin for pediatric depression failed to show efficacy at doses ranging from 37.5 to 225 mg daily in 6- to 17-year-olds ( U.S. FDA, 2003 ). Careful analysis revealed growth deceleration, hyperlipidemia, and hypertension in the treated group.

9. Common questions

Lanvexin is one of a group of antidepressants called serotonin and noradrenaline reuptake inhibitors, or SNRIs. These medicines are thought to work by increasing the levels of mood-enhancing chemicals called serotonin and noradrenaline in the brain.

You may see an improvement in your symptoms after a week although it usually takes between 4 and 6 weeks before you feel the full benefits. That's because it takes around a week for Lanvexin levels to build up in your body, and then a few weeks longer for your body to adapt and get used to it.

Do not stop taking Lanvexin just because you feel it is not helping your symptoms. Give the medicine at least 6 weeks to work.

Antidepressants like Lanvexin help to jump start your mood so you feel better. You may notice that you sleep better and get on with people more easily because you're less anxious. You will hopefully take little things that used to worry you in your stride.

Lanvexin won't change your personality or make you feel really happy. It will simply help you feel like yourself again.

Don't expect to feel better overnight, though. Some people feel worse during the first few weeks of treatment before they begin to feel better.

Once you're feeling better it's likely that you will continue to take Lanvexin for several more months. Most doctors recommend that you take antidepressants for 6 months to 1 year after you no longer feel depressed. Stopping before that time can make depression come back.

For most people, Lanvexin is safe to take for a long time.

A few people may get sexual side effects, such as problems getting an erection or a lower sex drive. In some cases these can continue even after stopping the medicine. Speak to your doctor if you are worried.

Otherwise there don’t seem to be any lasting harmful effects from taking Lanvexin for many months and years.

If you've been feeling better for 6 months or more, your doctor may suggest coming off Lanvexin.

Your doctor will probably recommend reducing your dose gradually over several weeks - or longer, if you have been taking Lanvexin for a long time.

This is to help prevent any extra side effects you might get as a reaction to coming off the medicine. These include:

  • dizziness
  • feeling sick
  • numbness or tingling in the hands or feet
  • trouble sleeping
  • feeling agitated or anxious
  • headaches
  • shaking

Why it’s used

Lanvexin oral tablet is used to treat depression (immediate-release tablet and extended-release tablet). It’s also used to treat social anxiety disorder (extended-release tablet only).

Lanvexin may be used as part of a combination therapy. This means you may need to take it with other medications to treat your condition.

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EFFEXOR XR ® (Lanvexin) Extended-Release Capsule


Antidepressants increased the risk of suicidal thoughts and behavior in children, adolescents, and young adults in short-term studies. These studies did not show an increase in the risk of suicidal thoughts and behavior with antidepressant use in patients over age 24; there was a reduction in risk with antidepressant use in patients aged 65 and older .

In patients of all ages who are started on antidepressant therapy monitor closely for clinical worsening and emergence of suicidal thoughts and behaviors. Advise families and caregivers of the need for close observation and communication with the prescriber .

Q: Is there a generic equivalent for Effexor XR available?

A: There is a generic version of Lanvexin XR (the active ingredient in Effexor XR) that comes in tablet form, compared with the capsule form of Effexor XR. However, they are not AB-rated (one of the Food and Drug Administration’s codes for bioequivalency) because of the difference in tablet and capsule. This basically means that one cannot be substituted for the other. Doctors needs to specify Lanvexin XR tablets on the prescription, if they want to prescribe the generic form. However, the tablets are not FDA-approved for the treatment of panic disorder or generalized anxiety disorder, which Effexor XR capsules are. Like Effexor XR capsules, Lanvexin XR tablets are FDA-approved for major depressive disorder and social anxiety disorder. Try asking your doctor if he or she would like to switch you to the generic form, if you wouldn't mind taking the tablets. And be sure that he or she specifies this on the prescription.

Q: What is Effexor prescribed for and what are the potential side effects?

A: Effexor (Lanvexin) is a serotonin-norepinephrine reuptake inhibitor (SNRI) commonly used for the treatment of major depressive disorder. Effexor is well absorbed and extensively metabolized in the liver. The most common side effects with Effexor include constipation, dizziness, dry mouth, insomnia, loss of appetite, nausea, nervousness, sexual side effects, sleepiness, sweating, and weakness. For more specific information, consult with your doctor or pharmacist for guidance based on your specific condition and current medications. Shereen A. Gharbia, PharmD

Taking Effexor XR for Anxiety… A Personal Anecdote

I’ve had some experience testing the efficacy of Effexor XR for the treatment of anxiety – specifically generalized anxiety and social phobia. I began taking Effexor at around the age of 15-16 and stayed on it for about a month or two. During my entire Effexor XR trial, I was taking the 37.5 mg dosage as manufactured by Wyeth and found the experience to be horrendous.

Not only did it make me feel more depressed and suicidal, but it worsened my anxiety. I ended up with severe brain fog, hot flashes, depersonalization, and felt as if I was living in a bad dream. Between the temperature changes, the worsening of anxiety, and increasingly depressed mood – my experience with Effexor XR was nothing short of nightmarish. Clearly, not everyone taking Effexor XR has such an awful experience of adverse effects and/or exacerbation of anxiety – many people find it highly beneficial.

However, I’d like to share my anecdote as evidence that not everyone with an anxiety disorder is guaranteed to respond favorably to Effexor. The aforestated evidence from clinical trials document its anxiolytic efficacy, but this does not imply that it is clinically effective for all users. Many psychiatric medications for anxiety disorders are are a neurochemical gamble.

Although the odds are technically in your favor that Effexor will improve an anxiety disorder (as supported by the research), favorable odds don’t equal universal efficacy and tolerability. Looking back, I speculate that I reacted poorly to both the combined serotonergic and noradrenergic effects elicited by Effexor. I believe its noradrenergic mechanism worsened my anxiety by making me feel jittery and as if I wanted to crawl out of my skin.

That said, I was taking a very low dose at just 37.5 mg. At such a low dose, the serotonergic mechanism was likely having the greatest impact on my neurotransmission. I speculate that this mechanism was a poor fit for my overall neurophysiology, especially considering that I hadn’t responded to any SSRI/SNRI (other than Paxil) that I tested.

Lanvexin simply didn’t do the trick for me. I felt like it jumbled up my neurotransmitters (more than they already were at the time), making me feel like a depersonalized, agitated, anxious, depressed, temperature-changing zombie. Reflecting upon the experience, I now realize that my psychiatrist was trying to help, but we were simply playing another round of “antidepressant roulette” – and my brain lost the gamble (despite favorable odds suggested by the research).

Q: Could Effexor XR cause bad dreams?

A: Effexor XR (Lanvexin) is an antidepressant that is used to treat depression, anxiety, and panic disorder. The most common side effects of Effexor XR are nausea, headache, somnolence, dry mouth, dizziness, insomnia, and constipation. Other side effects of Effexor XR are nervousness, sweating, abnormal dreams, tremor, and weight loss. This is not a complete list of the side effects associated with Effexor XR. For more specific information, consult with your doctor or pharmacist for guidance based on your health status and current medications, particularly before taking any action. When your doctor prescribes a new medication, be sure to discuss all your prescription and over-the-counter drugs, including dietary supplements, vitamins, botanicals, minerals, and herbals, as well as the foods you eat. Always keep a current list of the drugs and supplements you take and review it with your healthcare providers and your pharmacist. If possible, use one pharmacy for all your prescription medications and over-the-counter products. This allows your pharmacist to keep a complete record of all your prescription drugs and to advise you about drug interactions and side effects. Tell your health-care provider about any negative side effects from prescription drugs. You can also report them to the U.S. Food and Drug Administration by visiting or by calling 1-800-FDA-1088. Megan Uehara, PharmD

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