Tricyclic antidepressant (TCA)
Amitriptyline drug interactions: a practical overview
Drug interactions are the single biggest cause of preventable medication problems. Amitriptyline (Amitriptyline) interacts to varying degrees with several classes of medication and with a smaller list of foods. This page summarises the practically important ones at 10mg, 25mg, 50mg, 75mg, 100mg, framed for a real-world prescription review rather than an exhaustive PDF list.
High-priority interactions for Amitriptyline
For Amitriptyline, the most clinically relevant interactions are typically with strong CYP3A4 inhibitors and inducers, with cardiovascular medications (notably nitrates for several Tricyclic antidepressant (TCA) agents), with central nervous system depressants, and with medications affecting blood pressure or heart rate. Amitriptyline inhibits the reuptake of serotonin and noradrenaline at central synapses, raising synaptic levels of both neurotransmitters.
Working with the pharmacist
A pharmacist review of all current medications is the practical safeguard against unintended interactions with Amitriptyline. According to the prescribing information for Amitriptyline, the full medication list — prescription, OTC, supplements and recreational substances — should be reviewed before starting and at every dose change at 10mg, 25mg, 50mg, 75mg, 100mg.
Frequently asked questions
What's the most important Amitriptyline interaction to know? ▾
For most Tricyclic antidepressant (TCA) medications, the highest-priority interaction is with nitrate medications used for chest pain — this combination is often a hard contraindication. After that, strong CYP3A4 inhibitors (some antifungals, macrolides) are the next concern at routine 10mg, 25mg, 50mg, 75mg, 100mg doses.
Do I need to tell the pharmacist about supplements? ▾
Yes. Supplements and herbal products can interact with Amitriptyline in ways that prescription drug-drug interaction databases miss. The pharmacist needs the complete picture — including supplements like St John's Wort, grapefruit-containing products and high-dose vitamins — to flag risks at 10mg, 25mg, 50mg, 75mg, 100mg.
Products containing Amitriptyline
More on Amitriptyline
- With alcoholAmitriptyline and alcohol — is it safe to drink?
- With foodShould Amitriptyline be taken with food?
- Side effectsAmitriptyline side effects: common, rare and warning signs
- Dosage guideAmitriptyline dosage guide: how much to take and when
- OnsetHow fast does Amitriptyline start working?
- DurationHow long does Amitriptyline last?
The information on this website is provided for reference and educational purposes only. It does not replace consultation with a qualified healthcare professional.