Quazepam may cause a severe allergic reaction. Stop taking quazepam and get emergency medical help if you have signs of an allergic reaction: hives; nausea and vomiting; snoring, difficulty breathing; swelling of your face, lips, tongue, or throat.
Quazepam can slow or stop your breathing, especially if you have recently used an opioid medication, alcohol, or other drugs that can slow your breathing. A person caring for you should seek emergency medical attention if you have weak or shallow breathing, if you are hard to wake up, or if you stop breathing.
Call your doctor at once if you have:
confusion, agitation, hallucinations;
unusual thoughts or behavior;
suicidal thoughts; or
worsening depression.
Some people using quazepam have engaged in activity such as driving, eating, making phone calls, or having sex and later having no memory of the activity. Tell your doctor if this happens to you.
The sedative effects of quazepam may last longer in older adults. Accidental falls are common in elderly patients who take benzodiazepines.
Common side effects may include:
daytime drowsiness;
headache, dizziness;
feeling very tired;
upset stomach; or
dry mouth.
For 1 to 2 days after you stop taking quazepam, you may have side effects such as:
trouble sleeping;
panic attacks, feeling nervous or light-headed;
uncontrolled crying;
nausea, vomiting, stomach pain; or
flushing (sudden warmth, redness, or tingly feeling).
This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.
 Quazepam side effects (more detail)
