Trazodone in Australia: A GP’s Practical Review for Adults Over 30

ATTENTION: If you are over 30, you already know what broken sleep does to your body. Waking at 3 a.m. with your mind racing, feeling exhausted by 7 a.m., snapping at your partner, struggling to concentrate at work, and dreading bedtime is no way to live. Perhaps you have tried over-the-counter sleep aids, herbal teas, meditation apps, or even benzodiazepines—but you still wake unrefreshed. Maybe you have been offered mirtazapine but worry about weight gain. Trazodone is an older, non-addictive antidepressant that many Australian GPs now use at low doses to restore sleep and mood, often without the morning hangover or weight gain of some alternatives. This article gives you the Australian doctor’s perspective on trazodone, what it is used for, how it compares with mirtazapine, and the safety questions you should discuss with your GP.

Disclaimer: This article is general information only and is not a substitute for individual medical advice. Always speak with your Australian doctor or pharmacist before starting or changing any medicine.

INTEREST: What is trazodone used for in Australia?

Trazodone is a serotonergic antidepressant—technically a serotonin antagonist and reuptake inhibitor (SARI)—registered by the TGA for the treatment of major depression. In Australian practice, it is also commonly prescribed off-label at lower doses for insomnia, anxiety, and sleep disturbance. At low doses of 25–150 mg at night, trazodone has a strong sedative effect that helps people fall asleep and stay asleep. At higher doses of 150–300 mg or more daily, it acts more like an antidepressant, often used alongside other therapies.

• Depression: usually 150–300 mg daily, often taken at night or in divided doses.
• Insomnia: typically 25–100 mg at night, about 30–60 minutes before bed.
• Anxiety and PTSD: often 50–150 mg at night to reduce nighttime hyperarousal, racing thoughts, and nightmares.

Trazodone is not a benzodiazepine. It does not carry the same dependence or addiction risk, and many patients find it easier to stop than older sedatives. In Australia, low-dose trazodone for insomnia is usually written as a private script, so cost can vary. Your GP and pharmacist can help you understand the price.

DESIRE: Why Australian doctors choose trazodone

From a doctor’s point of view, the best medicine is one that matches the patient’s real-life problems. For many people over 30, the main pain points are not just “depression” or “anxiety” as labels. They are waking unrefreshed, feeling tense at night, losing focus, dreading bedtime, and worrying about weight gain or sexual side effects from other antidepressants. Trazodone addresses several of these at once:

• Helps you fall asleep and stay asleep without the next-day grogginess that many people report with some sedating antihistamines.
• Generally weight-neutral—unlike mirtazapine, which often increases appetite and weight.
• Low rate of sexual side effects, which matters for adult men and women on long-term antidepressants.
• May reduce anxiety and agitated depression, especially at night.
• Non-addictive, so it can be used as part of a long-term sleep and mood strategy without the tolerance problems often seen with benzodiazepines.

DESIRE: Trazodone vs mirtazapine – which is better for sleep in Australia?

This is one of the most common questions in Australian general practice. The honest answer is that neither drug is better for everyone—the right choice depends on your individual symptoms, weight, appetite, and risk of falls. The table below summarises how they compare in Australian practice.

In Australian practice, if your main problem is waking at 2–4 a.m. and being unable to return to sleep, and you are already at a healthy weight or worried about gaining weight, many GPs choose low-dose trazodone first. If you are underweight, have lost your appetite, or need stronger sedation at sleep onset, mirtazapine might be preferred. There is no single “better” drug—only the better match for your symptoms.

DESIRE: Safety topics every patient asks about

Trazodone and heart rhythm problems – QT prolongation

Trazodone can prolong the QT interval on an electrocardiogram (ECG), which in rare cases can trigger an abnormal heart rhythm. This is uncommon at low doses of 25–150 mg in healthy adults, but the risk rises with higher doses, overdose, or if you take other medicines that also affect the QT interval. Before prescribing, your GP may ask about fainting, palpitations, a family history of sudden cardiac death, or use of other QT-prolonging drugs. If needed, an ECG can be arranged. Do not combine trazodone with other QT-prolonging medicines without medical advice.

Trazodone and caffeine – possible interactions

There is no major direct metabolic interaction between caffeine and trazodone, but clinically they work against each other. Caffeine can worsen anxiety, reduce trazodone’s sedative effect, and contribute to night sweats and palpitations. If you are using trazodone for sleep, limit caffeine after midday, avoid energy drinks, and consider switching to decaf after 2 p.m. This simple change can make a meaningful difference in sleep quality and reduce unwanted side effects.

Trazodone – interaction with HIV medications

Some HIV medicines, especially ritonavir, cobicistat, and certain protease inhibitors, can slow the liver enzyme CYP3A4 that breaks down trazodone. This may lead to higher trazodone levels, causing excess sedation, dizziness, and a higher chance of QT prolongation. Other antiretrovirals may change levels in the opposite direction. If you take HIV medication, your GP and HIV specialist must communicate before starting trazodone. Never stop or change your HIV medicines—dose adjustment of trazodone is usually the solution.

Trazodone – sweating – management

Night sweats or increased sweating can occur with trazodone, especially at higher doses or when it is combined with other serotonergic medicines. Practical management includes:

• Taking trazodone 30–60 minutes before bed rather than right at bedtime.
• Keeping the bedroom at 18–21°C and using breathable cotton bedding.
• Reducing caffeine and alcohol, which can worsen sweating.
• Reviewing other medicines with your doctor—especially SSRIs, SNRIs, triptans, or tramadol—because too much serotonin can cause sweating and, rarely, serotonin syndrome.
• If sweating persists, your GP may lower the dose or change the timing.

Seek urgent medical attention if sweating is accompanied by high fever, muscle stiffness, confusion, or rapid heart rate—these can be signs of serotonin syndrome.

Trazodone – elderly – Beers criteria and falls risk in Australia

In older Australians, the Beers criteria and local geriatric guidelines remind us that any sedating medicine can increase falls and fractures. Trazodone is not strongly anticholinergic, but it can cause orthostatic hypotension—a drop in blood pressure when standing—especially at the start of treatment or after dose increases. In patients over 70, Australian doctors generally start with 25 mg at night, assess walking and balance, and review after two weeks. If there is a history of falls, dizziness, or fainting, trazodone may not be the first choice. However, when used carefully, it can be safer than benzodiazepines for selected older patients with insomnia and anxiety.

DESIRE: Trazodone – off-label uses – common in Australian practice

Although TGA-approved for depression, trazodone is widely used off-label in Australia for:

• Chronic insomnia, especially sleep-maintenance insomnia.
• Anxiety and agitated depression.
• Post-traumatic stress disorder, particularly to reduce nightmares.
• SSRI-associated sexual dysfunction, sometimes used as add-on therapy.
• Chronic pain or fibromyalgia with sleep disturbance.

Off-label prescribing is legal and common when supported by clinical experience and published evidence, but your doctor should clearly explain the expected benefits and risks for your situation.

ACTION: Your next step

If you recognise yourself in this article—lying awake at 3 a.m., tired of morning fog, worried about weight gain or dependence—it may be time to ask your Australian GP about trazodone. Be honest about your sleep pattern, mood, caffeine intake, and any other medicines, including HIV treatments. Your doctor may recommend a trial of low-dose trazodone, possibly with an ECG if you have heart risk factors or take interacting medicines.

Ask your GP: “Could low-dose trazodone help my sleep and mood without the weight gain of mirtazapine and without benzodiazepine dependence?” A private prescription can be filled at any Australian pharmacy, and your GP can help you weigh the cost against the benefit of finally sleeping through the night.

Remember: This article is educational and does not replace individual medical advice. Only your doctor can decide whether trazodone is safe and appropriate for you.