Amitriptyline (Antidepressant)

Key Takeaways

• Amitriptyline is a tricyclic antidepressant that was FDA-approved in 1961 for the treatment of depression
• The drug is also prescribed off-label for various mental health disorders, including insomnia and certain eating disorders.
• Off-label uses for physical conditions include the treatment of migraines, nerve pain, chronic pain, bladder pain, IBS, and excessive saliva

Amitriptyline Overview

Amitriptyline is a medication primarily used to manage symptoms of depression and depression-related anxiety. The drug is classified as a tricyclic antidepressant (TCA) as its chemical structure has three interconnected rings of atoms. ^[1]

Previously known as the brand name ELAVIL, amitriptyline received FDA approval for the treatment of depression in 1961. In addition to its official use as an antidepressant, the medication is also prescribed off-label to treat various alternative psychiatric disorders, including: ^{[1] [2] [3]}

• Anxiety
• Bipolar disorder
• Psychotic disorders
• Attention/deficit hyperactivity disorder (ADHD)
• Post-traumatic stress disorder (PTSD)
• Eating disorders (mainly anorexia and bulimia)
• Sleep disorders (particularly insomnia)

When used to treat depression and other mental health conditions, amitriptyline typically provides some relief within 2 to 4 weeks, but it can take between 8 and 12 weeks to experience the full benefit of the drug. The effects are seen more quickly when treating pain or preventing migraines with lower doses and can take as little as 1 to 4 weeks to reach full benefit. ^[2]

Beyond psychiatric disorders, amitriptyline is also used off-label to treat a wide range of medical conditions. Research shows that the medication can provide symptom relief and assist in managing the following physical health concerns: ^{[1] [2] [3]}

• Migraines
• Tension headaches
• Nerve pain
• Chronic pain
• Bladder pain syndrome
• Irritable bowel syndrome
• Excessive saliva production

Brand Names

The brand names for amitriptyline (Elavil, Endep, and Vanatrip) have all been discontinued, and the drug is now only available in generic form, with names including: ^[1][2]

• Ag-amitriptyline
• Amitriptyline HCL

How Does Amitriptyline Work?

While amitriptyline’s exact method of action is not fully understood, research shows that it can be effective in treating mental health conditions after several weeks of treatment. The drug has been found to increase levels of serotonin and norepinephrine, which play a key role in mood regulation and improve symptoms such as low energy and emotional distress. ^[1]

In addition to improving mood, research shows that amitriptyline can relieve certain types of chronic pain (including pain that does not respond well to standard painkillers). These pain-relieving effects are thought to be linked to both changes in mood-boosting brain chemicals and the drug’s effect on the nervous system. ^[1]

What to Know Before Taking Amitriptyline

While the FDA has approved the use of amitriptyline for the treatment of depression, in a select group of people, the drug can cause adverse reactions. Before taking amitriptyline, it is important to be aware of the following: ^[2]

• The drug is linked to suicidal thoughts and behavior in individuals with psychiatric disorders below the age of 25
• Amitriptyline is only approved to treat people above the age of 18

Additionally, you should not use amitriptyline if: ^{[2] [3]}

• You have taken an MAO inhibitor in the past 14 days
• You have a history of heart problems, including abnormal heart rhythms, a recent heart attack, or heart failure
• You have eye conditions like angle-closure glaucoma, trouble emptying your bladder, or a history of seizures
• You have kidney or liver problems (in which case, lower doses may be needed)
• You are planning elective surgery, as amitriptyline may interact with anesthesia and affect the heart rhythm

While these are common precautions for amitriptyline use, a doctor can provide a comprehensive recommendation based on your personal health circumstances.

Dosage

Amitriptyline is available in tablets and liquid form, with tablets available in strengths of 10mg, 25mg, and 50mg. The liquid form is also prescribed in these strengths, with each 5ml measurement containing 10mg, 25mg, or 50mg. For adults, the usual starting dose is 10-25mg per day, usually dosed at bedtime. ^[4]

Doses are started low to avoid side effects typically associated with amitriptyline. This is especially important for older adults or those with heart conditions. This dose can then be gradually adjusted as required. The maximum recommended daily dose for depression is 150mg, but this should only be used under the guidance of a specialist. ^[4]

Precautions

As amitriptyline can cause suicidal thoughts, it is imperative to contact your doctor immediately if you notice new or worsening mood changes, restlessness, trouble sleeping, or thoughts of self-harm or suicide after taking the drug. Additionally, it is important to: ^{[1] [2]}

• Abstain from combining amitriptyline with alcohol, as this can cause serious side effects or even be life-threatening
• Avoid driving or operating machinery until you know how the medicine affects you, as it may cause drowsiness or slow reactions
• Stay out of direct sunlight and avoid tanning beds, as amitriptyline can make skin more sensitive to sunburn
• Only use amitriptyline during pregnancy after discussing the potential risks and benefits with your healthcare provider
• Consult a doctor about using the drug while breastfeeding, as small amounts of amitriptyline pass into breast milk

Side Effects

Amitriptyline is known to trigger both common and rare side effects, so it is important to remain vigilant for the following signs and to seek medical help urgently should any present themselves.

Common Side Effects

Commonly encountered side effects of amitriptyline include: ^{[2] [3]}

• Appetite changes
• Weight gain
• Dizziness
• Headaches
• Dry mouth, mouth pain, or unusual taste
• Sleepiness, fatigue, or tiredness
• Vision changes
• Diarrhea or constipation
• Nausea or vomiting
• Upset stomach
• Reduced urination
• Black tongue
• Breast swelling (in both men and women)
• Reduced libido, impotence, and difficulty reaching orgasm

Rare and Severe Side Effects

In rare cases, amitriptyline can cause severe side effects, including: ^{[2] [3]}

• Chest pain, pressure, or pain spreading to the jaw or shoulder, with nausea or sweating (signs of a heart attack)
• Irregular heart rhythms, slowed heartbeat or pounding heart, low blood pressure, dizziness, and fainting (serious cardiovascular issues)
• Difficulty breathing, hives, facial or throat swelling (life-threatening allergic reaction)
• Sudden numbness, weakness, vision or speech problems, arm/leg swelling or redness (signs of a blood clot)
• Mood or behavior changes, including anxiety, panic, irritability, agitation, aggression, restlessness, depression, and suicidal thoughts
• Confusion, hallucinations, or unusual thoughts/behavior (the drug may cause psychosis in rare cases)
• Dry mouth, blurred vision, urinary retention, rapid heart rate, glaucoma, and confusion (slowing of nerve signals)
• Fever, chills, sore throat, or mouth sores (infection or severe reaction to amitriptyline)
• Seizures (amitriptyline may lower seizure threshold, especially at high doses)
• Easy bruising or unusual bleeding (the drug increases the risk of fractures or rare bone marrow suppression)

It is also important to highlight a couple of important caveats to treatment with amitriptyline that can pose significant risks in certain age groups and situations: They are as follows: ^{[2] [3]}

• High risk of delirium, falls, and cognitive impairment in the elderly (65 years and over)
• Sudden cardiac death risk due to QTc prolongation (arrhythmia risk), especially with doses greater than 100 mg or with other drugs with a similar risk profile
• An overdose is highly lethal in many circumstances due to the potential for seizures and toxic heart effects.

It is for the above reasons that it is very important to go over all existing medical conditions and prescription medications with your provider before initiating amitriptyline therapy.

Drug Interactions With Amitriptyline

There are hundreds of drugs known to cause adverse reactions when taken with amitriptyline, as certain medications can interact with each other and change blood levels, which increases the risk of side effects and reduces the effectiveness of the drug. For this reason, it is imperative to inform your doctor of any other medications you may be taking, especially: ^{[1] [2]}

• Sleeping pills
• Narcotic pain medicines
• Muscle relaxers
• Medicines for seizures
• Drugs that treat depression, anxiety, mood disorders, or other mental health conditions
• Cold or allergy medications
• Parkinson’s disease pharmaceuticals
• Medicines for stomach problems, motion sickness, or irritable bowel syndrome
• Medicines for an overactive bladder
• Asthma medicines

Cessation and Withdrawal

Ceasing to take amitriptyline suddenly can cause uncomfortable withdrawal symptoms, including nausea, headaches, muscle pain, anxiety, tiredness, restlessness, and trouble sleeping. In light of this, it is essential to speak to your doctor about how to gradually and safely reduce your dose. ^{[2] [4] [5]}

When to Stop Taking Amitriptyline

If your health has been stable for at least 6 months, your doctor may advise slowly reducing your amitriptyline dose. That said, it is important to keep in mind that stopping suddenly can cause withdrawal symptoms, and dosage should be tapered gradually under medical guidance. ^[4]

Amitriptyline FAQs

Can amitriptyline cause addiction?

Amitriptyline is not addictive, but the medication can cause withdrawal symptoms if stopped suddenly. To avoid this, it is best to consult your doctor before discontinuing treatment.

What should I do if I miss a dose?

If you forget to take a dose of amitriptyline, you can take it as soon as you remember, but if it is almost time for your next dose, skip the missed one and continue with your regular dosing.

What should I do if I take too much amitriptyline?

Taking too much amitriptyline can be life‑threatening, so the best thing to do is to seek emergency medical help or contact the Poison Help line at 1‑800‑222‑1222 right away.

Does Amitriptyline Help With Anxiety?

Although amitriptyline is not FDA-approved to treat anxiety disorders, the drug is often prescribed off-label for this purpose, with recent open-access studies indicating that it can effectively reduce symptoms of anxiety. ^[3]

Does Amitriptyline Cause Weight Gain?

Weight gain is a commonly reported side effect of amitriptyline, occurring in approximately 1% to 10% of users. This is thought to result from the drug’s effect on histamine receptors, which can lead to an increased appetite and subsequent weight gain. ^[2]

Does Amitriptyline Make You Sleepy?

Amitriptyline can make you sleepy, so it is best to take the drug in the evening and avoid drinking alcohol, as it can increase drowsiness and other side effects. Do not drive, cycle, or use machinery if you feel tired or less alert after taking the medication. ^[5]

Final Thoughts

Amitriptyline is a versatile medication that not only helps manage depression and other psychiatric disorders but also offers relief for chronic pain, migraines, and various medical conditions. Its benefits develop gradually, often showing results within a few weeks and taking full effect over several months.

While generally safe when taken as prescribed, amitriptyline can cause common side effects such as drowsiness and weight gain, as well as rare but serious risks involving the heart, immune system, or even suicidal thoughts and attempts, and can be contraindicated in certain age groups and medical conditions. Careful monitoring, awareness of drug interactions, and gradual dose adjustments ensure the safest and most effective treatment.

Author

Star Gorven

Star Gorven is a wellness and mental health writer with a talent for crafting evocative and evidence-based content across a wide range of topics. Her work blends analytical research with imagination and personality, offering thoughtful insights drawn from her exploration of subjects such as psychology, philosophy, spirituality, and holistic wellbeing.

Activity History - Last updated: March 19, 2026, Published date: March 19, 2026

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Reviewer

David MilesPharmD

David is a seasoned Pharmacist, natural medicines expert, medical reviewer, and pastor.

Activity History - Medically reviewed on March 20, 2026 and last checked on March 19, 2026