About mirtazapine - a quick recap of the section
Mirtazapine capsule, sold under brand names such as Remeron and as generic mirtazapine, is an antidepressant frequently prescribed for major depressive disorder. It belongs to the NaSSA class - noradrenergic and specific serotonergic antidepressants - and is often chosen when sleep disturbance or poor appetite are prominent features.
- Drug class - NaSSA antidepressant
- Active molecule - mirtazapine
- Common tablet strengths - 7.5 mg, 15 mg, 30 mg, sometimes 45 mg
- Typical therapeutic aim - treat depressive symptoms; may help with insomnia and appetite loss
If you need to check combinations with other medicines, see people relating to one anothers across departments improve alignment. and major risks. For rules on obtaining mirtazapine in the UK, jump to alignment with legal and regulatory standards observations.
Who to tell before you kick off
Before a prescriber gives you mirtazapine, you should make them aware of any relevant history or conditions. Important examples include:
- Past or family history of bipolar disorder or manic episodes
- Recent self-harm, prior suicidal thoughts, or large mood swings
- Significant liver or kidney problems
- Allergies to mirtazapine or any excipients in the tablet
- Pregnancy, attempting to conceive, or breastfeeding
Note: children and adolescents are not usually started on mirtazapine without specialist child and adolescent mental health services (CAMHS) input. If you are young, request specialist assessment.
How to take control it
Follow the written directions on the prescription label and any verbal advice from your clinician. Mirtazapine brand name Remeron is commonly taken once daily; many people prefer the evening dose because of its sedating effects.
Standard tablets should be swallowed with water. For orodispersible tablets, place the tablet on the tongue and let it dissolve before swallowing; water is optional. Try to take your dose at a similar time each day to keep blood levels steady.
Do not increase or stop the medicine abruptly without consulting the prescriber. If you feel unwell after starting, contact your pharmacist or clinician. In suspected non fatal overdose, call NHS 111, local emergency services or proceed to the nearest emergency department. For ongoing safety and confirm the resultss, see monitoring and logging and risk mitigation procedures.
After a dose is missed: guidance
If you do not take a dose, take it when you remember unless the next scheduled dose is within about four hours. If the next dose is due soon, skip the missed tablet and continue your usual routine. Avoid taking two doses together to catch up.
When you may notice effects
- Sleep and anxiety: some people see improved sleep or less anxiety within the first week
- Mood and interest: mood improvements often appear after 2 to 4 weeks; maximal benefit may take up to 6 weeks or longer
- Advice: keep taking the medicine as directed and discuss progress with your prescriber if there is no improvement after several weeks
If you plan to stop or change treatmentappraisal the guidance in stopping or switching medicines.
Interactions between parties and major risks
Avoid taking mirtazapine together with monoamine oxidase inhibitors (MAOIs) such as phenelzine, tranylcypromine or selegiline. Combining these medicines can produce serious or life-threatening reactions.
- Conditions precluding use - MAOIs, procarbazine and high doses of tryptophan
- Herbal products - St. Johns wort increases the risk of serotonin-related harmful effects and should be avoided
Use caution and seek clinical advice before combining mirtazapine with other drugs that may raise serotonin or increase sedation:
- Other antidepressants or certain antipsychotic medicines - risk of serotonin syndrome
- Prescribed Linezolid or IV methylene blue administration. - can substantially increase serotonin
- Liquid alcohol, benzodiazepines, opioid analgesics and other sedating agents - increased drowsiness and impaired concentration
Not all items are included in this list. Always give your healthcare team a complete list of prescription medications, over-the-counter products, herbal remedies and supplements. For day-to-day safety tips, see safety and performance monitoring measures.
Vigilance and safeguards
Attend scheduled follow-up appointments so the prescriber can review response and negative effects. Benefits may take weeks, so remain on therapy unless advised otherwise.
- Drowsiness and dizziness - avoid driving or operating machinery until you know how mirtazapine affects you; stand up slowly to reduce lightheadedness; avoid alcohol because it increases sedation
- Mood or behavioral changes - you and people close to you should watch for worsening depression, new suicidal thoughts, increased agitation, restlessness or unusual changes in sleep, particularly after starting or changing dose
- Mouth dryness - sugar-free gum, lozenges or frequent sips of water can help; tell your clinician if it persists
- OTC medicines - check with a pharmacist before using cough, cold or allergy remedies as some ingredients may interact
If you notice worrying signs, contact your prescriber promptly. Find related material recognising undesired reactions for urgent warning signs.
Recognising potential side effects
Seek urgent medical attention if you develop any serious reactions:
- Allergic reactions - widespread rash, itching, hives, swelling of the face, mouth, throat or tongue, or difficulty breathing
- Marked mental changes - severe agitation, confusion, sudden large mood swings or new suicidal thoughts
- Signs of a rare blood disorder - high fever, sore throat, mouth ulcers or flu-like symptoms
- High intensity abdominal pain with vomiting, unexplained bruising, excessive bleeding or marked limb swelling
Common, typically less serious effects include drowsiness, increased appetite and weight gain, constipation and dry mouth. For ongoing monitoring in real time advice and strategies, refer to observing and implementing safety measures. To lower withdrawal risk, see stopping or switching medicines.
Stopping or switching medicines
Do not stop mirtazapine suddenly unless a clinician tells you to. Gradual dose reduction is usually advised to reduce withdrawal symptoms such as anxiety, irritability, sleep disturbance, severe head pains or flu-like symptoms.
- Plan any change with your prescriber, especially when switching to or from an MAOI or another antidepressant
- Report ongoing or severe withdrawal effects so the tapering plan can be adjusted
- If the drug does not help after an adequate trial, discuss other options in other possible paths and quick comparisons
Secure end of life the storage of files is essential for data management. and disposal
- Keep medicines out of sight and reach of children
- Store at normal room temperatures, protected from dampness and strong light
- Do not use after the expiry date; return unused or out-of-date tablets to a pharmacy for safe disposal
Optional routes and quick side by side checks
There is no single best antidepressant for everyone. Choice depends on symptom pattern, side-effect profile and medical history. Typical more options include:
- SSRIs - sertraline, citalopram, escitalopram, fluoxetine
- SNRIs - venlafaxine, duloxetine
- Other agents - vortioxetine, bupropion (used less often in the UK), trazodone, agomelatine
- Tricyclic antidepressants - amitriptyline, nortriptyline, doxepin (used selectively)
Notes on selection: SSRIs are commonly offered first-line because of guideline recommendations and general tolerability, but mirtazapine may be favored where sedation and appetite stimulation are useful. Formulation matters - standard generic tablets are generally cheaper than orodispersible or branded products. Discuss benefits, likely unintended effects and cost with your prescriber involved.
Price guide - UK
Cost varies by how you obtain the medicine and which formulation you choose. Typical guidance for Great Britain is:
- NHS prescriptions - in England a per-item charge applies (around 9.90 pounds per item at the time of writing); prescriptions are free in Scotland, Wales and Northern Ireland
- Prescription prepayment certificates - if you need multiple items, a prepayment certificate in England may reduce overall cost
- Private purchase - a 28 to 30 day supply of generic mirtazapine often costs approximately 3 to 10 pounds depending on strength; branded or orodispersible versions can be more expensive, often in the 15 to 30 pounds range
- Price variation - check local pharmacies and registered online pharmacies for up-to-date custom pricing
When buying online, use pharmacies registered with the General Pharmaceutical Council and look for the UK distance selling logo. For regulatory advice, see legal and regulatory controls briefs (UK).
UK strategic guidance on legal and regulatory matters affairs notes
- Prescription status - mirtazapine is prescription-only (POM) in the UK; a prescriber registered in the UK must issue a prescription
- Online pharmacies - only use pharmacies registered with the General Pharmaceutical Council (GPhC); check for the GPhC registration and distance selling logo
- Regulators - the Medicines and Healthcare products Regulatory Agency (MHRA) handles licensing and safety issues
- Travel and import - carry medicines in original packaging with your prescription or a copy; personal importation rules apply and commercial unlicensed supply is illegal
- Driving and work - mirtazapine can impair alertness; do not drive or operate heavy machinery if affected
- Safe disposal - return unwanted medicines to a pharmacy rather than disposing in household waste
Follow routine safety oriented guidance in ongoing observation and safety practices and evaluate the clear the give and take of interactions reduce confusion. in people relating to one anothers are not just about words, but meaning. and major risks.
The questions that come up often - FAQ
- Could I have a drink that contains alcohol? Beverage with ethanol increases sedation and may worsen side effect risks. It is generally best to avoid alcohol while taking mirtazapine. See the networked exchange of ideass in the user journey shape satisfaction. and major risks.
- Will I gain weight? Appetite upturn and weight gain can occur with mirtazapine. Discuss lifestyle measures and realistically possible alternative remediation options together with your clinician. See recognising lingering effects.
- How long will I need treatment? Many people continue antidepressants for at least six months after symptoms improve to reduce relapse risk; duration is based on individual clinical judgement.
- What if I feel worse after starting? If you experience worsening mood or new thoughts of harming yourself, seek prompt medical help from your prescriber, NHS 111 or emergency services. See ongoing observation and safety practices.
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