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Amitriptyline

Depressive Disorder, Pain

DRUG STATUS

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Approvals

US(FDA), UK(BNF)

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Essential Medicine

YES

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Teratogenicity

Unlisted

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Pharmaceutical Class

Tricyclic Antidepressant

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Amitriptyline

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Summary

  • Amitriptyline is primarily used to treat depression. It's also used for anxiety and certain types of chronic pain, such as neuropathic pain or migraines. It can also help manage insomnia associated with depression and anxiety.

  • Amitriptyline works by increasing the levels of neurotransmitters, specifically serotonin and norepinephrine, in the brain. This helps improve mood, alleviate pain, and improve communication between neurons.

  • The usual starting dosage for adults is 25 to 50 mg per day, taken at bedtime. The dose can be gradually increased based on individual response, up to a maximum of 150 mg per day. It's taken orally, usually in the evening or before sleep due to its sedative effects.

  • Common side effects of Amitriptyline include dry mouth and dizziness. Rare but severe side effects can include hallucinations and heart arrhythmias. Abruptly stopping the medication can lead to withdrawal symptoms like dizziness, nausea, headache, irritability, and flu-like symptoms.

  • Amitriptyline should be used with caution in patients with a history of heart disease or seizures. It can also increase the risk of suicidal thoughts or behavior, especially in young adults. It's excreted in breast milk and can cause adverse effects in nursing infants, so breastfeeding mothers should be cautious. Pregnant women should discuss the risks and benefits with their healthcare provider.

Indications and Purpose

What is Amitriptyline used for?

Amitriptyline is a medicine used to treat depression. It works best for people with a type of depression called endogenous depression, which is caused by changes in brain chemistry. Amitriptyline can help improve mood, sleep, and energy levels.

How does Amitriptyline work?

Amitriptyline blocks the reuptake of serotonin and norepinephrine in the brain, which improves neurotransmitter levels and communication between neurons, helping to relieve depression and other conditions.


Is Amitriptyline effective?

Multiple studies have shown that Amitriptyline is effective in treating depression and other conditions, including neuropathic pain, fibromyalgia, and migraines.


How does one know if Amitriptyline is working?

Amitriptyline's benefit is typically checked by monitoring symptoms, mood, and quality of life over time using scales and journaling, and adjusting the dosage as needed.


Directions for Use

How do I take Amitriptyline?

Amitriptyline can be taken with or without food, but it is typically recommended to take it at bedtime due to its sedative effects. There are no specific food restrictions while taking this medication. However, alcohol should be avoided as it can increase the risk of side effects such as drowsiness or dizziness. Always follow the dosage instructions provided by your healthcare provider.

 

 

For how long do I take Amitriptyline?

The typical duration of Amitriptyline use varies by condition. For depression, it is usually recommended for at least 3 to 6 months after symptom relief to prevent relapse. For chronic pain or migraine prevention, the duration may be longer and individualized based on response. Regular follow-ups with a healthcare provider are essential to assess the need for continued treatment.

How long does it take for Amitriptyline to start working?

Amitriptyline may take 1 to 3 weeks to show noticeable effects on mood and pain relief. However, it can take up to 4 to 6 weeks for its full therapeutic benefits to be experienced, especially for conditions like depression or chronic pain. Some individuals may notice sedation or improvement in sleep patterns sooner.

 

 

How should I store Amitriptyline?

Amitriptyline should be stored in a cool, dry place, away from direct heat and light, at room temperature (between 68°F and 77°F; 20°C and 25°C). It should be kept in a tightly closed container and protected from moisture and humidity.


 

Warnings and Precautions

Who should avoid taking Amitriptyline?

Cardiac effects: Amitriptyline can cause heart arrhythmias and should be used with caution in patients with a history of heart disease.

Seizures: Amitriptyline can lower the seizure threshold and should be used with caution in patients with a history of seizures.

Suicide risk: Amitriptyline can increase the risk of suicidal thoughts or behavior, especially in young adults.


Can I take Amitriptyline with other prescription drugs?

Antidepressants: Taking Amitriptyline with other antidepressants, such as SSRIs or MAOIs, can increase the risk of serotonin syndrome, which can be life-threatening.

Blood pressure medications: Amitriptyline can increase the effects of some blood pressure medications, leading to dangerously low blood pressure.

Sedatives: Amitriptyline can increase the sedative effects of other medications, such as benzodiazepines or opioids.


Can I take Amitriptyline with vitamins or supplements?

St. John's Wort: This herb can increase the levels of Amitriptyline in the blood, leading to increased side effects.

Valerian: This herb can increase the sedative effects of Amitriptyline, leading to increased drowsiness.

Melatonin: This supplement can increase the risk of drowsiness and dizziness when taken with Amitriptyline.


 

Can Amitriptyline be taken safely while pregnant?

Amitriptyline is classified as a Pregnancy Category C drug, which means it may cause fetal harm, and pregnant women should discuss the risks and benefits with their healthcare provider.


Can Amitriptyline be taken safely while breastfeeding?

Amitriptyline is excreted in breast milk and can cause adverse effects in nursing infants. Breastfeeding mothers should be cautious when taking Amitriptyline and monitor their infant for any signs of distress.


Is Amitriptyline safe for the elderly?

Amitriptyline is a medication used to treat depression. It's important to start elderly patients on a low dose and monitor them closely because they are more sensitive to its side effects. These side effects can include a fast heart rate, trouble peeing, constipation, dry mouth, blurry vision, and worsening of glaucoma. Elderly patients are also at an increased risk of falling while taking amitriptyline. It's important to avoid taking amitriptyline with other medications called monoamine oxidase inhibitors (MAOIs) because this can cause serious reactions.