What is Mirtazapine used for?
Mirtazapine is an antidepressant used to treat major depressive disorder and related mood conditions. It helps balance natural chemicals such as serotonin and noradrenaline in the brain, improving mood, sleep, and appetite. Doctors in Australia may also prescribe it for anxiety, insomnia, or stress-related disorders. By restoring chemical balance, Mirtazapine can lift mood, reduce restlessness, and help you feel calmer and more stable each day.
How to take Mirtazapine?
Take Mirtazapine exactly as your doctor or pharmacist has directed. It’s usually taken once a day before bedtime, as it can make you feel sleepy. Swallow the tablet whole with a glass of water, with or without food. Do not crush or chew it. Try to take it at the same time each night to maintain steady medicine levels in your body for best results.
Dosage instructions
The starting dose of Mirtazapine for adults is often 15 mg taken once daily before bed. Your doctor may gradually increase the dose to 30 mg or 45 mg depending on your response. Do not change your dose or stop taking it without medical advice. Always follow your doctor’s instructions closely to achieve the desired effect and avoid unwanted side effects.
Side effects of Mirtazapine
Common side effects of Mirtazapine may include:
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Drowsiness or tiredness
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Increased appetite and weight gain
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Dry mouth or constipation
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Dizziness or light-headedness
These effects are usually mild and improve over time. Serious but rare reactions such as mood changes, confusion, or irregular heartbeat require medical attention. Contact your GP or pharmacist immediately if you experience any unusual or persistent symptoms.
Drug interactions
Mirtazapine may interact with:
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MAO inhibitors (for example, phenelzine or tranylcypromine)
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Other antidepressants or anti-anxiety medicines
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Sleeping tablets, alcohol, or antihistamines
Mixing these can cause excessive drowsiness or dangerous side effects. Always tell your doctor or pharmacist about any other prescription medicines, supplements, or herbal products (including St John’s Wort) before starting Mirtazapine.
Warnings
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Do not stop taking Mirtazapine suddenly as this may cause withdrawal symptoms such as nausea or anxiety.
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Avoid alcohol, which can increase drowsiness.
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Inform your doctor if you have liver, kidney, or heart problems.
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Not recommended for under-18s without medical supervision.
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Until you know how the medicine affects you, avoid driving or operating heavy machinery.
Storage
Store Mirtazapine below 25 °C, in a cool, dry place away from heat and moisture. Keep it in its original packaging and out of reach of children. Do not use tablets past the expiry date printed on the pack. Dispose of any unused medicine safely through your local pharmacy return programme.
FAQs
What are the side effects of Mirtazapine in the elderly?
Elderly people taking Mirtazapine may experience increased drowsiness, dizziness, or confusion, which can raise the risk of falls. Other side effects include weight gain, dry mouth, and constipation. Some may feel light-headed when standing up. Regular check-ups with a doctor are important to monitor tolerance and adjust dosage safely for older adults.
Can I take Mirtazapine after drinking alcohol?
It’s best to avoid taking Mirtazapine after drinking alcohol. Combining the two can increase drowsiness, dizziness, and affect your coordination or judgement. Alcohol may also worsen depression or anxiety symptoms. Wait until the alcohol has fully left your system before taking your dose, and always follow your doctor’s advice for safe use.How long does Mirtazapine take to work?
Mirtazapine usually starts improving sleep and appetite within one to two weeks, but mood improvement may take four to six weeks. Everyone responds differently, so keep taking it as prescribed even if you don’t feel better straight away. Do not stop suddenly — speak to your doctor before making any changes to your dose.How long before bed should I take Mirtazapine?
Take Mirtazapine about 30 to 60 minutes before bedtime, as it can make you feel sleepy. Taking it at the same time each night helps maintain steady levels in your body and improves sleep quality. If you experience morning drowsiness, talk to your doctor about adjusting the timing of your dose.How long does Mirtazapine take to work?
Some people notice better sleep and appetite after one to two weeks, but full mood improvement can take four to six weeks. Continue taking it as prescribed even if you don’t feel immediate benefits. Do not stop suddenly without medical supervision.
Does Mirtazapine help with anxiety?
Yes, Mirtazapine can help reduce anxiety and calm the nervous system. It promotes relaxation and improves sleep, which can ease tension. It’s often prescribed for patients experiencing both depression and anxiety.
Is Mirtazapine good for anxiety?
Mirtazapine is effective for anxiety because it increases serotonin and noradrenaline activity in the brain, helping to stabilise mood and reduce worry. It’s often used when anxiety co-exists with insomnia or depressive symptoms.
Can I buy Mirtazapine online over the counter or without a prescription in Australia?
In Australia, Mirtazapine is a Schedule 4 (prescription-only) medicine, so it cannot be purchased over the counter. You may, however, order it online through an authorised pharmacy after submitting a valid prescription. Always ensure the supplier is licensed under TGA regulations to guarantee medicine quality and safety.
Where can I buy Mirtazapine online at a low price in Australia?
You can buy Mirtazapine at a competitive price from reputable Australian online pharmacies such as international drug mart. Always provide your prescription before ordering. Some sites offer discount codes or coupon deals for repeat prescriptions, secure checkout, and quick home delivery across Australia.
