Amitriptyline for bedwetting is not the first treatment most families encounter — and it is not the most commonly prescribed. But for some children, particularly those who have not responded to alarms or desmopressin, it remains a legitimate clinical option. If a specialist has mentioned it, or you have read about it and want to understand what it actually involves, this article gives you the facts clearly.
What Is Amitriptyline and Why Is It Used for Bedwetting?
Amitriptyline is a tricyclic antidepressant. That sounds alarming in the context of bedwetting, but in this setting it is prescribed at doses far lower than those used to treat depression — typically 10–25mg in children, compared with 75–150mg or more for mood disorders. The mechanism by which it reduces bedwetting is not fully understood, but it is thought to act on bladder contractions, reduce the depth of sleep (making arousal easier), and possibly affect ADH-related signalling. It has been used off-label for nocturnal enuresis for decades.
In the UK, amitriptyline is not a first-line treatment for bedwetting. NICE guidance (CG111) recommends the bedwetting alarm as the preferred initial intervention for children aged 5 and over, with desmopressin as the recommended medication. Amitriptyline sits further down the pathway — typically considered only when those options have failed, are contraindicated, or when a specialist judges it appropriate. If you are at this stage, there is more context in this article on what comes next when standard treatments have not worked.
What Does the Evidence Say?
The evidence for amitriptyline in bedwetting is real but modest. Studies do show a reduction in wet nights compared with placebo. A Cochrane review of tricyclic antidepressants for nocturnal enuresis found they were significantly more effective than placebo during treatment, but relapse rates after stopping were high — comparable to, or higher than, those seen with desmopressin. The response is not curative for most children; it suppresses the symptom while the medication is being taken.
There is no strong evidence that amitriptyline outperforms desmopressin or the alarm in head-to-head comparisons, and the side effect profile means it tends to be used cautiously. It is not recommended in children under 6, and some clinicians set the threshold higher.
Who Might Be Offered Amitriptyline?
In practice, amitriptyline tends to come up in a small number of specific situations:
- Desmopressin has not worked or has stopped working — see also what to do when desmopressin stops working
- Alarm therapy has been unsuccessful after an adequate trial
- There are comorbidities such as anxiety, ADHD, or chronic pain where amitriptyline might address more than one issue at low dose
- The child has not responded to combination therapy (alarm plus desmopressin together)
- Short-term targeted use — for instance, to cover a period such as a school trip or holiday when other options are insufficient
The decision should always come from a paediatrician or specialist. GPs occasionally prescribe it but this sits more appropriately within a secondary care or continence clinic setting. If your GP has declined a referral and you feel one is warranted, this guide on how to request a referral may help.
Side Effects and Safety
This is the section most parents want to read carefully, and rightly so. Amitriptyline has a broader side effect profile than desmopressin. Common effects at low doses include:
- Drowsiness or sedation (particularly in the first weeks)
- Dry mouth
- Constipation — already a relevant concern in children with bedwetting, since constipation can worsen enuresis independently
- Blurred vision
- Mood changes or increased irritability in some children
The more serious concern with amitriptyline in children relates to cardiac effects. Tricyclics affect the electrical conduction of the heart, and there are historical reports of cardiac arrhythmia and accidental overdose fatalities. Because of this, prescribing guidelines typically require an ECG before starting treatment in children, and the medication must be kept securely out of reach — both because of accidental ingestion risk and because the margin between a therapeutic and toxic dose is narrower than with many other drugs.
This is not a reason to refuse consideration of the treatment, but it is a reason to ensure it is managed by a clinician with appropriate oversight, not as a casual trial.
How It Is Prescribed and Monitored
A typical protocol in a paediatric or continence clinic setting involves:
- Baseline ECG
- Starting at the lowest appropriate dose (often 10mg for younger or smaller children)
- Review after 4–6 weeks to assess response and side effects
- Dose adjustment if needed, within safe limits
- A clear plan for stopping — amitriptyline should generally be tapered rather than stopped abruptly
It is not a medication to continue indefinitely without reassessment. If there is no meaningful response after an adequate trial, the prescribing clinician will usually recommend stopping.
What Happens When You Stop?
The most common pattern is that bedwetting returns after stopping amitriptyline. This is consistent with the broader evidence for medications used in enuresis — they tend to suppress rather than resolve the underlying issue. For some children, however, the period of dryness achieved with medication coincides with natural maturation, and they remain dry after stopping. There is no way to predict which children this will apply to.
This is worth discussing honestly with your child’s clinician before starting, so expectations are calibrated. If the goal is long-term dryness, medication alone is rarely the complete answer.
Combining Amitriptyline With Other Management
Amitriptyline does not have to be the only strategy in place. Most families using any bedwetting medication continue to use overnight protection — whether that is pull-ups, taped briefs, or bed pads — to manage wet nights that do occur. There is no conflict between using medication and using practical protection; both are about reducing the impact on the child and the family.
If overnight leaks remain a problem despite medication, the product being used may not be matched to the volume or the child’s sleep position. Understanding why overnight pull-ups leak can help you make more effective choices while treatment continues.
Talking to Your Child About It
Children old enough to be prescribed amitriptyline are old enough to be given an honest, age-appropriate explanation. You do not need to lead with “it’s an antidepressant” — you can explain that it is a medicine that helps the bladder send the right signals at night. What matters most is that the child understands they are taking a tablet each evening, why it needs to be taken consistently, and that it needs to be kept safe. Involving them in the process, without overloading them with clinical detail, helps with compliance and reduces anxiety around the treatment. More on honest, low-shame conversations is covered in this guide to talking about bedwetting without shame.
Summary: What Parents Should Weigh Up
Amitriptyline for bedwetting is a third-line treatment — not because it does not work, but because the safety profile means it requires more careful oversight than the alarm or desmopressin. The evidence supports its effectiveness during the period of treatment. The relapse rate on stopping is high. The cardiac precautions are real and should not be bypassed.
For families who have exhausted the standard options and are being offered amitriptyline by a specialist, it is a legitimate next step — not a desperate measure, not a last resort with nothing to recommend it. Like all treatments for bedwetting, it works for some children and not others, and the decision belongs with your clinical team and with you.
If you are not yet sure whether you have worked through all the available options first, it may be worth reviewing where you are in the treatment pathway before accepting or declining this one.
