Big picture summary
Effexor XR is the extended release formulation of venlafaxine, an SNRI antidepressant that acts on serotonin and noradrenaline pathways. In the United Kingdom it is commonly prescribed for major depression and several anxiety disorders, including panic disorder. You may also see modified-release venlafaxine referred to as Efexor XL in some materials.
Main active drug component
Venlafaxine is the principal active ingredient. It increases levels of serotonin and noradrenaline in the brain to help lift mood and reduce anxiety and panic symptoms. Its extended-release design provides more stable blood levels over the day compared with immediate-release preparations.
Who this is for exactly
Venlafaxine MR may be used for a variety of clinical presentations. Usual symptoms include:
- The psychiatric label major depressive disorder
- Generalised anxiety disorder and its hallmark excessive worry
- The mental health condition panic disorder
- Social context fear disorder, in selected patients
Choice of treatment depends on the diagnosis, previous treatment response, side effect profiles and patient preference. Psychological therapies are often recommended alongside or before medication in many cases.
Forte options currently available
Extended-release venlafaxine commonly comes in several strengths in UK medicine dispensaries. Typical options are:
- the 37.5 mg dose
- 75 mg
- 150 mg
Starting doses are individualised; clinicians usually begin at a low dose and increase as needed while time sensitive monitoring tolerability.
How to deal with this matter
- Take capsules whole with water. Do not cut, crush or chew modified-release capsules.
- Try to take the medicine at the same time each day, and with food if advised.
- Follow the prescriber's instructions exactly. Do not raise the dose or stop the medicine suddenly without medical advice; gradual tapering is commonly required to reduce withdrawal effects.
- Use in children and adolescents under 18 requires specialist assessment and careful constant monitoring.
For questions about administration or dose adjustments, speak with your prescriber or pharmacist.
When one dose is missed
If you forget to take a single dose, take it promptly after you remember, unless the next dose is due imminently. If that occurs, omit the i did not take a dose and resume normal dosing. Do not attempt to make up for a i did not take a dose by taking two doses.
An overdose case of medicine
In cases of suspected an opioid overdose, call for urgent medical support immediately. In the UK call 999 for emergencies or NHS 111 for immediate advice. Bring the medicine packaging with you if possible.
Before you start the project
Tell your doctor or pharmacist about any of the following, as these may affect suitability or the act of monitoring:
- Previous or current bipolar disorder, mania or hypomania
- Epilepsy and seizure history
- Heart disease, high blood pressure or recent heart attack
- Impairment affecting renal or hepatic function
- Eye illnesses such as glaucoma
- Eating disorders or marked weight loss
- Pathology of the thyroid
- Past suicidal thoughts or attempts
- Known allergy to venlafaxine or similar drugs
- If you are expecting and planning to conceive, or breastfeeding
Never share your prescription with others; this medicine is prescribed specifically for the individual patient.
Connections coupled with the exchange between peoples among teammates fuel progress.
Venlafaxine interacts with a range of medicines and some herbal products. Provide a full list of current medicines, including over-the-counter items and supplements, to your clinician and pharmacist.
Inadvisable combinations
- In the MAOI category you will find phenelzine, tranylcypromine, isocarboxazid, and selegiline.; also the antibiotic linezolid
- The medicinal herb St Johns wort, also known as Hypericum perforatum
- Tryptophan pill supplements
- Certain weight-loss medicines and appetite suppressants
- Nefazodone therapy and duloxetine when used concurrently without specialist advice
- Procarbazine as a cancer therapy
Medicines requiring caution or observation and tracking
- Other antidepressants or mood altering drugs
- Triptan migraine treatments such as sumatriptan or rizatriptan
- Certain pain medicines with serotonergic action like tramadol
- Stimulant drugs prescribed for ADHD
- NSAIDs and aspirin, which may raise bleeding risk
- Anticoagulants and some antiplatelet agents
- Some heart rhythm and blood pressure medicines
- Cimetidine the H2 receptor antagonist, clozapine and some antivirals including ritonavir
Combining drugs that increase serotonin may lead to serotonin syndrome. If you experience agitation, high temperature, sweating, confusion or muscle twitching, get urgent medical help. Cross references Vigilant supervision and monitoring and safety protocols steps for early warning signs.
Network monitoring and preventive measures
- It can take 2 to 4 weeks or longer to see clinical improvement. Keep regular follow up so effectiveness and after effects can be reviewed.
- Blood pressure and pulse can rise; clinicians commonly check these, especially after dose changes.
- Be alert for any worsening mood, new suicidal thoughts or unusual behaviour, particularly when starting or increasing the dose. Report these immediately.
- Venlafaxine may cause drowsiness, dizziness or blurred vision. Do not drive or use machinery until you know how it affects you. Avoid alcohol as it can increase sedation.
- I have a dry mouth is common; sugar-free gum or increased fluids may help. Ask a pharmacist before taking medicines for colds or allergies as they may interact.
- Do not stop abruptly; withdrawal symptoms such as dizziness, nausea, anxiety and sleep disturbances can occur if the medicine is discontinued suddenly.
Untoward effects
Seek urgent help if you notice
- Allergic signs such as rash, itching, hives, or swelling of face, lips or throat
- Breathlessness
- Eye pain, marked changes in vision or halos around lights
- Severe agitation, hallucinations or loss of contact with reality
- Seizure fits
- New or increasing suicidal ideation
- Problems passing urine
- Bleeding or bruising that is unusual
General effects that are typically mild.
- Nausea and reduced appetite
- Amplified perspiration
- Infrequent defecation
- Tremor
- Shifts in libido and sexual performance
- Weight loss
This list is only partial. Persistent or troublesome symptoms should be discussed with your prescriber or pharmacist.
Storing and disposing of items
- Keep this product away from children and out of sight.
- Store in a dry place at 20 to 25 C (68 to 77 F).
- Do not use after the expiry date on the carton.
- Return unused or expired medicine to a pharmacy for safe disposal. Do not dispose via wastewater.
Similar therapies and substitute medicines
Several other medicines and approaches may be considered depending on symptoms, side effect concerns and patient preference:
- SNRIs: duloxetine is a related option and may be preferable for some patients.
- In the class of SSRIs there are sertraline, citalopram, escitalopram, and fluoxetine. and paroxetine are commonly used first-line for depression and anxiety.
- Other antidepressants: mirtazapine (may help with sleep and appetite), vortioxetine (may help cognitive symptoms), and tricyclics like amitriptyline in selected situations.
- Non-drug options: talking therapies such as cognitive behavioural therapy, lifestyle changes, exercise and support groups.
If cost is an issue, generic venlafaxine or a generic SSRI is often less expensive than a branded product. In case of the process of people engaging concerns, refer to the section below. Interactive encounters.
Rough private pricing options comparisons (approximate, per month supply) in the UK: generic sertraline 50 mg around 2 to 6 GBP; duloxetine 30 mg typically 8 to 20 GBP; branded Effexor XR usually costs more than generics. Prices vary by supplier and include possible consultation fees for online services.
Regular UK broad price ranges
Price varies by pharmacy, region and whether supplied on the NHS or privately. Typical private retail ranges for a 28 to 30 day supply are:
- Venlafaxine MR strength: 37.5 mg generic: approximately 3 to 8 GBP
- Venlafaxine MR 75 mg generic: approximately 4 to 12 GBP
- Venlafaxine MR 150 mg generic: approximately 6 to 15 GBP
Private online services often add a consultation or dispensing fee, so monthly totals can be about 10 to 30 GBP. NHS prescriptions in England carry the standard prescription charge unless you are exempt; prescriptions are free in Scotland, Wales and Northern Ireland. Branded Effexor XR, where still listed, tends to be more costly than generic venlafaxine.
Information about Access under UK legislation
- Juridical status: venlafaxine is prescription-only (POM) in the UK. A prescription from a clinician registered in the UK is required.
- Initial prescribing: it is not always the first choice; clinicians consider individual risk, benefits and observation and tracking requirements such as blood pressure checks.
- Online supply: choose pharmacies registered with the General Pharmaceutical Council. Online suppliers should display a GPhC registration number alongside the MHRA distance-selling logo.
- Personal import: MHRA guidance permits limited personal imports for individual use; bringing in larger supplies may be questioned by customs. A common practical limit is roughly a three month supply, but check current MHRA and customs rules.
- Driving and safety: if the medicine affects your alertness it may be an offence to drive. Do not drive if you feel impaired by the medication.
- The phase of pregnancy and lactation: discuss risks and benefits with a specialist prescriber before starting or stopping treatment.
- The younger generation and adolescents: prescribing under 18s should be done with specialist advice and careful follow-up.
For regulated service checks visit the GPhC register or NHS websites. In urgent cases contact NHS 111 or 999 for emergencies.
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