Norway· NO-ID_F1861825-D1D8-413C-8538-225BDC42B73D
L-Tryptophan source naturals
A tryptophan product containing tryptofan, registered in Norway by Vita-World. The same ATC class is registered in 5 of our 19 countries.
Checked against FEST (Norway) on
Informational only — not a medical device.
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: Norway, from FEST (Norway)
- 2 of them publish a price we can compare per daily dose
Tryptophan · ATC N06AX02
5 / 19 countries
- Canada
- Germany
- Norwayprice
- United Kingdom
- United Statesprice
The record
At a glance
FEST (Norway)- Active substance
- Tryptofan
- Manufacturer
- Vita-World
- Country
- Norway (NO)
- ATC code
- N06AX02
- ATC class
- Tryptophan
- Defined daily dose
- 1 g, O
- Reimbursed
- Not published by this register
- Source register
- FEST (Norway)
- Last checked
- September 25, 2026
Packs & prices · 3
- no_merkevare_idID_F1861825-D1D8-413C-8538-225BDC42B73D
- no_varenummer31204860
- gtin21078019794
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
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.
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.
- CanadaAPO-TRYPTOPHANAPOTEX INC
- United KingdomOptimax 500mg capsulesEsteve Pharmaceuticals Ltd
- United StatesL-TryptophanProfessional Complementary Health Formulas
- GermanyArdeydormArdeypharm Gmbh
- BelgiumNephrotectFresenius Kabi
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 FEST (Norway). 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/059db04b-35a6-49d7-bf92-43bae9e104d4 GET /v1/drugs/059db04b-35a6-49d7-bf92-43bae9e104d4?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.
{
"form": "Kapsel, hard",
"source": "fest",
"status": "A",
"atc_name": "Tryptofan",
"merkevare_id": "ID_F1861825-D1D8-413C-8538-225BDC42B73D",
"name_form_strength": "L-Tryptophan source naturals kaps 500 mg",
"prescription_group": "C"
}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.