Patient Leaflet Updated 13-Oct-2026 | Aurobindo Pharma - Milpharm Ltd.
Mirtazapine 15mg/30mg/45mg OD tablets
Mirtazapine 15 mg orodispersible tablets
Mirtazapine 30 mg orodispersible tablets
Mirtazapine 45 mg orodispersible tablets
(mirtazapine)
1. What Mirtazapine is and what it is used for
2. What you need to know before you take Mirtazapine
3. How to take Mirtazapine
4. Possible side effects
5. How to store Mirtazapine tablets
6. Contents of the pack and other information
Mirtazapine is one of a group of medicines called antidepressants. Mirtazapine is used to treat depressive illness in adults.
Mirtazapine will take 1 to 2 weeks before it starts working. After 2 to 4 weeks you may start feeling better. You must talk to your doctor if you do not feel better or if you feel worse after 2 to 4 weeks. More information is in section 3 heading "When can you expect to start feeling better".
Serious skin reactions including Stevens-Johnson syndrome (SJS), toxic epidermal necrolysis (TEN) and drug reaction with eosinophilia and systemic symptoms (DRESS) have been reported with the use of mirtazapine. Stop using and seek medical attention immediately if you notice any of the symptoms described in section 4 in relation to these serious skin reactions.
Talk to your doctor or pharmacist before taking Mirtazapine.
If you are taking buprenorphine-containing medicinal products. The use of these medicines together with Mirtazapine can lead to serotonin syndrome, a potentially life-threatening condition (see “Other medicines and Mirtazapine.”).
Mirtazapine should normally not be used for children and adolescents under 18 years because efficacy was not demonstrated. Also, you should know that patients under 18 have an increased risk of side-effects such as suicide attempt, suicidal thoughts and hostility (predominantly aggression, oppositional behaviour and anger) when they take this class of medicines. Despite this, your doctor may prescribe Mirtazapine for patients under 18 because he/she decides that this is in their best interests. If your doctor has prescribed Mirtazapine for a patient under 18 and you want to discuss this, please go back to your doctor. You should inform your doctor if any of the symptoms listed above develop or worsen when patients under 18 are taking Mirtazapine. Also, the long-term safety effects concerning growth, maturation and cognitive and behavioural development of mirtazapine in this age group have not yet been demonstrated. In addition, significant weight gain has been observed in this age category more often when treated with Mirtazapine compared with adults.
If you are depressed you can sometimes have thoughts of harming or killing yourself. These may be increased when first starting antidepressants, since these medicines all take time to work, usually about two weeks but sometimes longer.
You may be more likely to think like this:
You may find it helpful to tell a relative or close friend that you are depressed, and ask them to read this leaflet. You might ask them to tell you if they think your depression is getting worse, or if they are worried about changes in your behaviour.
Also take special care with mirtazapine
Tell your doctor or pharmacist if you are taking, have recently taken or might take any other medicines.
Take care when taking mirtazapine in combination with:
You may get drowsy if you drink alcohol while taking mirtazapine.
You are advised not to drink any alcohol.
You can take mirtazapine with or without food.
If you are pregnant or breast-feeding, think you may be pregnant or are planning to have a baby, ask your doctor or pharmacist for advice before taking this medicine.
Limited experience with mirtazapine administration to pregnant women does not indicate an increased risk. However, caution should be exercised when used during pregnancy. If you use mirtazapine until, or shortly before birth, your baby should be supervised for possible adverse effects.
Make sure your midwife and/or doctor knows you are on Mirtazapine. When taken during pregnancy, similar drugs (SSRIs) may increase the risk of a serious condition in babies, called persistent pulmonary hypertension of the newborn (PPHN), making the baby breathe faster and appear bluish. These symptoms usually begin during the first 24 hours after the baby is born. If this happens to your baby you should contact your midwife and/or doctor immediately.
Mirtazapine can affect your concentration or alertness. Make sure these abilities are not affected before you drive or operate machinery. If your doctor has prescribed Mirtazapine for a patient under 18 years make sure the concentration and alertness is not affected before participation in traffic (e.g. on bicycle).
Mirtazapine tablets contains aspartame, a source of phenylalanine. May be harmful for people with phenylketonuria.
Always take this medicine exactly as your doctor or pharmacist has told you. Check with your doctor or pharmacist if you are not sure.
The recommended starting dose is 15 or 30 mg every day. Your doctor may advise you to increase your dose after a few days to the amount that is best for you (between 15 and 45 mg per day). The dose is usually the same for all ages. However, if you are an elderly person or if you have renal or liver disease, your doctor may adapt the dose.
It is best to take mirtazapine as a single dose before you go to bed. However your doctor may suggest to split your dose of mirtazapine – once in the morning and once at night-time before you go to bed. The higher dose should be taken before you go to bed.
Take your tablets orally.
1. Do not crush the orodispersible tablet
In order to prevent crushing the orodispersible tablet, do not push against the tablet pocket (Figure A).
2. Tear off one tablet pocket
Each strip contains six tablet pockets, which are separated by perforations. Tear off one tablet pocket along the dotted lines (Figure 1).
3. Peel off the lid
Carefully peel off the lidding foil, starting in the corner indicated by the arrow (Figures 2 and 3).
4. Take out the orodispersible tablet
Take out the orodispersible tablet with dry hands and place it on the tongue (Figure 4).
It will rapidly disintegrate and can be swallowed without water..
Usually mirtazapine will start working after 1 to 2 weeks and after 2 to 4 weeks you may start to feel better.
It is important that, during the first few weeks of the treatment, you talk with your doctor about the effects of mirtazapine:
If you still don’t feel better, your doctor may prescribe a higher dose. In that case, talk to your doctor again after another 2 to 4 weeks. Usually you will need to take mirtazapine until your symptoms of depression have disappeared for 4 to 6 months.
If you or someone else have taken too much mirtazapine, call a doctor straight away.
The most likely signs of an overdose of mirtazapine (without other medicines or alcohol) are drowsiness, disorientation and increased heart rate. The symptoms of a possible overdose may include changes to your heart rhythm (fast, irregular heartbeat) and/or fainting which could be symptoms of a life-threatening condition known as Torsade de Pointes.
If you are supposed to take your dose once a day
If you are supposed to take your dose twice a day
If you stop too early, your depression might come back. Once you are feeling better, talk to your doctor. Your doctor will decide when treatment can be stopped.
Do not suddenly stop taking mirtazapine, even when your depression has lifted.
If you suddenly stop taking mirtazapine you may feel sick, dizzy, agitated or anxious, and have headaches. These symptoms can be avoided by stopping gradually. Your doctor will tell you how to decrease the dose gradually.
If you have any further questions on the use of this medicine, ask your doctor or pharmacist.
Like all medicines, this medicine can cause side effects, although not everybody gets them.
Uncommon (may affect up to 1 in 100 people):
Rare (may affect up to 1 in 1,000 people):
Not known (frequency cannot be estimated from the available data):
Very common (may affect more than 1 in 10 people):
Common (may affect up to 1 in 10 people):
Uncommon (may affect up to 1 in 100 people):
Rare (may affect up to 1 in 1,000 people):
Not known (frequency cannot be estimated from the available data):
In children under 18 years the following adverse events were observed commonly in clinical trials: significant weight gain, hives and increased blood triglycerides.
If you get any side effects, talk to your doctor or pharmacist or nurse. This includes any possible side effects not listed in this leaflet. You can also report side effects directly via the Yellow Card Scheme Website: www.mhra.gov.uk/yellowcard. By reporting side effects you can help provide more information on the safety of this medicine.
Keep this medicine out of the sight and reach of children.
Do not use this medicine after the expiry date which is stated on the carton and blister after EXP. The expiry date refers to the last day of that month.
This medicinal product does not require any special storage conditions.
Do not throw away any medicines via wastewater or household waste. Ask your pharmacist how to throw away medicines no longer used. These measures will help to protect the environment.
Orodispersible tablet.
Mirtazapine 15 mg orodispersible tablets:
White, round (diameter 6.5 mm) orodispersible tablets debossed with “36”on one side and ‘A’ on the other side with an embossed circular edge.
Mirtazapine 30 mg orodispersible tablets:
White, round (diameter 8.0 mm) orodispersible tablets debossed with “37” on one side and ‘A’ on the other side with an embossed circular edge.
Mirtazapine 45 mg orodispersible tablets:
White, round (diameter 9.5 mm) orodispersible tablets debossed with “38” on one side and ‘A’ on the other side with an embossed circular edge.
Mirtazapine orodispersible tablets are available in Polyamide/ aluminium/ PVC/ paper/ polyster/ aluminum perforated unit dose blister packs of 6, 18, 30, 48, 90 and 96 tablets.
Not all pack sizes may be marketed.
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This leaflet was last revised in 10/2025.
P1536554
Milpharm Limited, 1 Roundwood Avenue, Stockley Park, Uxbridge, UB11 1AF, UK
+ 44 (0)208 845 8811
+44 (0)208 845 8811
http://www.aurobindo.com
+44 (0)208 845 8795