
fast, pounding, or uneven heartbeat;
weakness, tremors (uncontrolled shaking), or sleep problems (insomnia);
severe restless feeling, hyperactivity;
confusion;
problems with vision; or
urinating less than usual or not at all.
Less serious side effects may include:
dizziness, drowsiness;
tired feeling;
dry mouth;
sore throat, cough;
nausea, constipation; or
headache.
This is not a complete list of side effects and others may occur. Tell your doctor about any unusual or bothersome side effect.
 Cetirizine side effects (more detail)
