DIPHENIST
OMEGA LABORATORIES LIMITED
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This is a national manufacturer shortage report. It does not confirm whether the product is unavailable at your local pharmacy — call ahead or ask your pharmacist.
Quick answers
Is there a shortage of DIPHENIST in Canada?
A shortage of DIPHENIST 50MG is expected: the manufacturer reported it to Health Canada as an anticipated shortage (last updated September 23, 2026), but it has not started yet.
Why is DIPHENIST not available?
The reason the manufacturer reported: Disruption of the manufacture of the drug.
When will DIPHENIST be available again?
The manufacturer's estimated resolution date is January 31, 2027. This is an estimate and can change; follow this page to get an email when the status changes.
Other Products Containing the Same Active Ingredient
These are other Health Canada-approved human drug products containing the same active ingredient, not currently reported in shortage. Strength, dosage form, and route can still differ — ask your pharmacist whether any of these are appropriate for you. This isn't a guarantee of current stock.
Closest Matches
DIPHENHYDRAMINE HYDROCHLORIDE INJECTION USP
SANDOZ CANADA INCORPORATED
Other Products
DORMIPHEN EXTRA-FORT CAPSULE
LABORATOIRE LALCO INC.
EXTRA STRENGTH NYTOL TAB 50MG
MEDTECH PRODUCTS INC
NYTOL EXTRA STRENGTH SLEEP AID CAPLET 50MG
MEDTECH PRODUCTS INC
PDP-DIPHENHYDRAMINE EXTRA STRENGTH/ EXTRA FORT
PENDOPHARM DIVISION OF PHARMASCIENCE INC
UNISOM
KNIGHT THERAPEUTICS INC.
What this means
Does this mean my pharmacy is already out of stock?
No — this shortage hasn't started yet. It's an early warning that supply may become tight, based on information from the manufacturer.
What should I do?
This product is usually given in a hospital or clinic, where the pharmacy team manages supply. If you're scheduled to receive it, ask your care team.
Estimated Resolution
2027-01-31
~3 months remaining (estimate)
This is the manufacturer's estimated date, not a guarantee — actual resolution may come earlier or later.
DIN
02219336
Strength
50MG
Dosage Form
LIQUID
Route
INTRAVENOUS INTRAMUSCULAR
Active Ingredient
DIPHENHYDRAMINE HYDROCHLORIDE
Tier
Unrated
Last Updated
2026-09-23
Reason for Shortage
Disruption of the manufacture of the drug.
Past Reports for This Drug
DIPHENIST has 2 shortage/discontinuation reports on file — this is one of them.
Other Products from OMEGA LABORATORIES LIMITED
Other Health Canada-approved products made by the same manufacturer — not necessarily related to this shortage, and not necessarily in shortage themselves.
9MG · DIN 02150204
250MG · DIN 02486717
25MG · DIN 00582662
50MG · DIN 00582654
DIN 02251477
20% · DIN 00658413
0.5% · DIN 01936441
1MG · DIN 02238903
7.5MG · DIN 02512424
20MG · DIN 02526778
20MG · DIN 02526751
222MG · DIN 02056429