ZYRTEC-D 12 HOUR® Extended Release Tablets side effects

The most common side effects seen in studies with ZYRTEC-D 12 HOUR® Extended Release Tablets include:

  • insomnia
  • dry mouth
  • fatigue
  • drowsiness
  • sore throat

Side effects from pseudoephedrine are not common, but they can occur. They include:

  • nervousness
  • excitability
  • restlessness
  • dizziness
  • weakness
  • insomnia
  • convulsions
  • tremors
  • fast or irregular heartbeat
  • palpitations