The short answer
Dry mouth and dizziness are recognized possible cannabis side effects. Water may ease thirst or a dry feeling, but the Health Canada guidance cited here does not identify it as a way to reverse THC impairment or restore coordination.
Dry mouth and dizziness are reported effects
Health Canada lists dry mouth and dizziness among possible effects. Adults over 55 may also need to consider blood-pressure changes, balance and fall risk. The effect can vary with product, route, amount and personal health.
Hydration is not an antidote
Sip water if thirsty, but do not treat hydration as proof that coordination has returned. Wait for effects to pass, do not drive, and avoid stairs, heights or machinery if dizzy. If an effect is severe, unexpected or worrying, contact a health professional; use emergency services for emergency symptoms. See our dizziness and fall-risk checklist.
Quick FAQ
Can cannabis cause dry mouth or dizziness?
Yes. Health Canada lists dry mouth and dizziness among possible side effects.
Does drinking water sober someone up?
The Health Canada guidance cited here does not identify water as a way to reverse THC impairment. Hydration may ease thirst, but allow time for effects to pass and do not drive while impaired.
What is the practical concern with dizziness?
Balance and coordination may be affected. Avoid driving, heights and other tasks where a fall or delayed reaction could cause harm.
Sources
- Health Canada: Cannabis side effects -- side effects and help-seeking.
- Health Canada: Cannabis health effects -- intoxication, impairment and duration.
- Health Canada: Adults 55+ -- sensitivity, dizziness and falls.
Sources checked 2026-09-25.