DOM-TRYPTOPHAN 1 G — DIN 02231255
TRYPTOPHAN : 1 G · DOMINION PHARMACAL · TABLET · wholesale supply in Canada
Health Canada status: CANCELLED PRE MARKET
What is DOM-TRYPTOPHAN?
DOM-TRYPTOPHAN 1 G contains TRYPTOPHAN : 1 G. It is listed in the Health Canada Drug Product Database under DIN 02231255, held by DOMINION PHARMACAL, supplied as TABLET for ORAL administration. Health Canada currently lists it as cancelled pre market, status dated 30-May-2025. This Drug Identification Number is no longer authorized for sale in Canada, so Nexara does not supply it. The record is kept here because buyers still meet the number on old formularies, purchase orders and tender documents; Nexara can help identify an authorized alternative.
Is there a generic Tryptophan in Canada, and who makes it?
Every market authorization holder with a Canadian DIN for this molecule, and how many of their listings Health Canada currently shows as marketed.
6 holders have a Canadian DIN containing Tryptophan, across 20 DINs, of which 11 are currently marketed. Marketed count is the number that matters: an approval that is not marketed cannot be bought.
| Market authorization holder | DINs | Marketed | Brand names | Position |
|---|---|---|---|---|
| BAUSCH HEALTH, CANADA INC. | 5 | 5 | TRYPTAN | Sourceable in Canada |
| APOTEX INC | 5 | 4 | APO-TRYPTOPHAN | Sourceable in Canada |
| TEVA CANADA LIMITED | 3 | 2 | TEVA-TRYPTOPHAN | Sourceable in Canada |
| PHARMASCIENCE INC | 3 | 0 | PMS-TRYPTOPHAN | No marketed DIN |
| PHARMEL INC | 3 | 0 | PHL-TRYPTOPHAN | No marketed DIN |
| DOMINION PHARMACAL | 1 | 0 | DOM-TRYPTOPHAN | No marketed DIN |
Health Canada’s Drug Product Database does not flag which listing is the originator and which are subsequent-entry products, so Nexara does not label them here. Interchangeability is determined provincially, not federally — confirm for your province before a formulary switch. Nexara can confirm which of these is actually obtainable, and on what lead time, per order.
How is it supplied and stored?
Pack configuration, storage class and the handling constraints that drive cold-chain planning. One DIN can cover more than one pack size, and the pack — not the DIN — is what gets priced, shipped and invoiced.
| Strength on the label | 1 G |
|---|---|
| Dosage form | TABLET |
| Route | ORAL |
Pack detail is kept as a regulatory record. This DIN is no longer authorized for sale in Canada, so Nexara does not quote this pack.
Substance and classification
| Active substance | Tryptophan |
|---|---|
| ATC code | N06AX02 |
| AHFS class | 28:16.04.92 |
| Biosimilar biologic | No |
Health Canada record and identifiers
The regulatory facts straight from the Drug Product Database, plus every identifier form Nexara accepts on a purchase order. A DIN written without its leading zeros is the commonest reason an order line fails to match.
| DIN (8-digit, as used in ordering) | 02231255 |
|---|---|
| DIN (unpadded, as printed on some documents) | 2231255 |
| Brand name | DOM-TRYPTOPHAN |
| Generic / active ingredient | TRYPTOPHAN : 1 G |
| Market authorization holder | DOMINION PHARMACAL |
| Health Canada schedule | Prescription |
| ATC code | N06AX02 |
| ATC anatomical main group | N — Nervous system |
| ATC therapeutic subgroup | N06AX |
| Current status | CANCELLED PRE MARKET |
| Status date | 30-May-2025 |
| Status source | Live Health Canada DPD sync |
Verify on the primary sources
What can be used instead?
Alternatives on every axis a buyer actually considers — the same molecule in another presentation, the same class, an adjacent class, or a fixed-dose combination. Every row is led by the marketed DIN count, because that is what can be bought this week.
1 · Same molecule, other Canadian presentations
11 of 20 Canadian DINs for this molecule are currently marketed. Marketed products are listed first.
| Product | Strength | Form | Holder | Health Canada status | DIN |
|---|---|---|---|---|---|
| APO-TRYPTOPHAN | 500 MG | TABLET | APOTEX INC | MARKETED | 02248538 |
| APO-TRYPTOPHAN | 750 MG | TABLET | APOTEX INC | MARKETED | 02458721 |
| APO-TRYPTOPHAN | 500 MG | CAPSULE | APOTEX INC | MARKETED | 02248540 |
| APO-TRYPTOPHAN | 1 G | TABLET | APOTEX INC | MARKETED | 02248539 |
| TEVA-TRYPTOPHAN | 500 MG | CAPSULE | TEVA CANADA LIMITED | MARKETED | 02240334 |
| TEVA-TRYPTOPHAN | 500 MG | TABLET | TEVA CANADA LIMITED | MARKETED | 02240333 |
| TRYPTAN | 250 MG | TABLET | BAUSCH HEALTH, CANADA INC. | MARKETED | 02239326 |
| TRYPTAN | 750 MG | TABLET | BAUSCH HEALTH, CANADA INC. | MARKETED | 02239327 |
| TRYPTAN | 500 MG | CAPSULE | BAUSCH HEALTH, CANADA INC. | MARKETED | 00718149 |
| TRYPTAN | 1 G | TABLET | BAUSCH HEALTH, CANADA INC. | MARKETED | 00654531 |
2 · Same class — other molecules in ATC N06AX
| Molecule | Canadian brands | DINs | Marketed | Sourceable |
|---|---|---|---|---|
| Venlafaxine | ACT VENLAFAXINE XR · APO-VENLAFAXINE XR · AURO-VENLAFAXINE XR · DOM-VENLAFAXINE XR · +19 more | 90 | 36 | Yes |
| Duloxetine | ACCEL-DULOXETINE · AG-DULOXETINE · APO-DULOXETINE · AURO-DULOXETINE · +24 more | 66 | 36 | Yes |
| Mirtazapine | APO-MIRTAZAPINE · AURO-MIRTAZAPINE · AURO-MIRTAZAPINE OD · AVA-MIRTAZAPINE · +24 more | 64 | 31 | Yes |
| Trazodone | AG-TRAZODONE · APO-TRAZODONE D TABLETS 150MG · APO-TRAZODONE TABLETS 100MG · APO-TRAZODONE TABLETS 50MG · +30 more | 57 | 21 | Yes |
| Desvenlafaxine | AG-DESVENLAFAXINE · APO-DESVENLAFAXINE · APO-DESVENLAFAXINE EXTENDED-RELEASE TABLETS · DESVENLAFAXINE · +8 more | 28 | 20 | Yes |
| Tryptophan | APO-TRYPTOPHAN · DOM-TRYPTOPHAN · PHL-TRYPTOPHAN · PMS-TRYPTOPHAN · +2 more | 20 | 11 | Yes |
| Bupropion | AVA-BUPROPION SR · BUPROPION HCL SR · BUPROPION HCL XL · BUPROPION SR · +13 more | 32 | 9 | Yes |
| Vortioxetine | APO-VORTIOXETINE · TRINTELLIX | 8 | 6 | Yes |
| Vilazodone | APO-VILAZODONE · VIIBRYD | 8 | 6 | Yes |
| Levomilnacipran | FETZIMA | 4 | 4 | Yes |
A molecule with zero marketed DINs cannot be sourced domestically, however many approvals it holds — if one of these sits on a formulary or in an older protocol, that is the line to check.
3 · Adjacent classes in ATC N06A
| ATC subgroup | Molecules | DINs | Marketed |
|---|---|---|---|
| N06AB | Citalopram · Escitalopram · Fluoxetine · Fluvoxamine · Paroxetine · +1 more | 589 | 248 |
| N06AA | Amitriptyline · Amoxapine · Clomipramine · Desipramine · Doxepin · +5 more | 325 | 62 |
| N06AG | Moclobemide | 21 | 4 |
| N06AF | Tranylcypromine | 2 | 2 |
Not clinical advice. These tables describe what can be supplied in Canada, not what should be prescribed. Substitution within or across classes is a prescriber and pharmacist decision, and interchangeability is determined provincially.
What else is DOM-TRYPTOPHAN called?
Also recorded in Canada as: melatonin 3 MG / tryptophan 100 MG Oral Capsule [Restone] (US), melatonin 3 MG / tryptophan 100 MG Oral Capsule (US), 5-hydroxytryptophan 50 MG / magnesium oxide 50 MG / melatonin 2 MG / tryptophan 100 MG / vitamin B6 10 MG Oral Capsule (US), tryptophan 500 MG Oral Capsule (US), tryptophan 500 MG Oral Tablet (US), 5-HYDROXYTRYPTOPHAN (US), TRYPTOPHAN (GLOBAL), L-Tryptophan (US), Tryptan (JP), Tryptorel (BR).
Can this still be bought in Canada?
No. This Drug Identification Number is cancelled pre market in Health Canada's Drug Product Database, so the product is no longer authorized for sale in Canada and Nexara does not supply it. This page is kept as a regulatory record.
If you are looking for a current equivalent, the alternatives above list every product sharing this therapeutic class, with the marketed ones first. Ask us to source an alternative
Ordering questions
Who can buy this from Nexara?
Licensed entities only. Nexara holds Health Canada establishment licence DEL 3-002896-A and ships only to a licensed address. Patients and unlicensed buyers are routed to a partner pharmacy.
Is there a minimum order?
Yes, set per product line and per pack multiple rather than on the order total, so you are never asked to buy a part-pack. The minimum for this line is confirmed with your quote.
What is the lead time?
Confirmed per order at quotation, and it depends on current stock position and whether the product is in shortage.
Why is there no price on this page?
Nexara quotes a delivered Canadian price per order, against a verified licence. Foreign list prices are published on incompatible bases and are not a guide to what any buyer can obtain here, so this page shows which markets list the molecule and on what basis, and nothing more.
Can Nexara supply this for a clinical trial?
Yes — comparator and background-therapy supply, including sourcing from other markets where a Canadian pack will not satisfy the protocol. Clinical trial supply.