# Drugs and alcohol — Blood donor deferral criteria compared across national blood services

For Drugs and alcohol, blood service is Canadian Blood Services; waiting period is must not be impaired at the time of donation; condition is so we can obtain informed consent; outcome is temporary deferral, recorded from its source on 2026-08-06.

- **Criterion:** Drugs and alcohol
- **Blood service:** Canadian Blood Services _(our reading, not quoted from the source)_
- **Waiting period:** must not be impaired at the time of donation _(verified: appears in the quote below)_
- **Condition:** so we can obtain informed consent _(verified: appears in the quote below)_
- **Outcome:** temporary deferral _(our reading, not quoted from the source)_

## What the source says

> Donors must not be impaired at the time of donation so we can obtain informed consent.

## Source

- https://www.blood.ca/en/blood/am-i-eligible-donate-blood/eligibility

Last verified: 2026-08-06. Review by: 2027-02-02.
Part of [Blood donor deferral criteria compared across national blood services](https://referencesource.org/blood-donor-deferral-criteria/).