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United States· US:63083-7423_6fb330ef-c6db-43e9-b1cd-14df3c6a9814

L-Tryptophan

A tryptophan product containing tryptophan, registered in United States by Professional Complementary Health Formulas. The same ATC class is registered in 5 of our 19 countries.

ATC N06AX02US label

Checked against FDA National Drug Code directory (United States) on

Informational only — not a medical device.

SOURCE REGISTER · USFDA National Drug Code directory (Unite…normalisedL-TryptophanATCN06AX02REGISTER NO.US:63083-7423_6fb330e…PACKS LISTED2CHECKEDSeptember 27, 2026
Compare price across countriesPer daily dose · free accountAsk the assistant about tryptophanAnswers with sources · free accountCheck interactionsSeverity free · mechanism on Growth

Where it is registered

Tryptophan is registered in 5 of 19 countries.

Countries holding a registration under ATC N06AX02 (tryptophan), each read from that country’s own register.

  • This record: United States, from FDA National Drug Code directory (United States)
  • 2 of them publish a price we can compare per daily dose
Search tryptophan products by name

Tryptophan · ATC N06AX02

5 / 19 countries

  • Canada
  • Germany
  • Norwayprice
  • United Kingdom
  • United Statesprice
Blue: a registration under this ATC code. The ringed marker is this record’s country. Markets marked price publish a price we can compare per daily dose.

The record

At a glance

FDA National Drug Code directory (United States)
Active substance
TRYPTOPHAN
Manufacturer
Professional Complementary Health Formulas
Country
United States (US)
ATC code
N06AX02
ATC class
Tryptophan
Defined daily dose
1 g, O
Reimbursed
Not published by this register
Source register
FDA National Drug Code directory (United States)
Last checked
September 27, 2026

Packs & prices · 2

  • ndc11
    6308374232
    59 mL in 1 BOTTLE, DROPPER (63083-7423-2)
  • ndc11
    63083-7423-2

Regulatory notes

No shortage, Orange Book or US label notes for this record.

Interactions

21 interactions on record for tryptophan.

Graded by severity as the source publishes them — 12 severe. Severity grades are free for everyone; mechanism and management come with Growth.

  • Severity for every pair — free, no plan needed
  • The source, licence and sync date on every record
  • Mechanism and what to do for each pair — Growth plan
Check tryptophan against other medicinesHow interaction checks work

Tryptophan · interactions on record

21 records

  • 12 severe
  • 9 moderate

Most severe, free to view

  • OndansetronA04AA01severe
  • GranisetronA04AA02severe
  • DolasetronA04AA04severe
  • PalonosetronA04AA05severe
  • Interaction severity from DDInter 2.0 (Xiong G. et al., Nucleic Acids Res.), licensed CC BY-NC 4.0 — free for non-commercial use only; not covered by the Drug Database commercial licence.
Mechanism and what to do, in the interaction check
Source: DDInter 2.0 · synced 29 Sept 2026. Grades as the source publishes them.

Same medicine, other countries

Tryptophan in 5 other countries

What each register calls a product with the same active substance — salts and hydrates count as the same.

All tryptophan products

Authorised across Europe · EMA

The same active substance is authorised in 2 EEA countries. Names it is sold under:

  • Germany · Ardeydorm, Ardeytropin
  • United Kingdom (Northern Ireland) · Optimax

Source: European Medicines Agency, Article 57 product data.

Sourced from a public register and reproduced with attribution. Drug Database is not affiliated with, endorsed by, or a partner of FDA National Drug Code directory (United States). This is an informational data service and not a medical device — verify against the official source of record before any clinical decision.

For developers

The same record over the API, and the raw payload
GET /v1/drugs/fea0c0c2-e71c-450a-ac70-49bce886c36e
GET /v1/drugs/fea0c0c2-e71c-450a-ac70-49bce886c36e?format=fhir

Every response carries last_synced_at, so freshness is a field rather than a promise. Below is exactly what the ingestion wrote, before any presentation — the same JSON the API returns under payload.

{
  "route": "ORAL",
  "source": "ndc",
  "strength": "4",
  "substance": "TRYPTOPHAN",
  "productndc": "63083-7423",
  "dosage_form": "LIQUID",
  "dea_schedule": null,
  "strength_unit": "[hp_X]/59mL",
  "application_number": null,
  "marketing_category": "UNAPPROVED HOMEOPATHIC"
}
API referenceMCP serverPlans

See everything about tryptophan.

This page is the registration. A free account adds the label text as the regulator wrote it, what it costs per daily dose across the markets that publish a price, a feed of what changes in the registers, and an assistant that answers with its sources. Interaction severity is free; mechanism and management are on the Growth plan. No card, nothing to install.

Try it freeOpen in the console