Verapamil Overview, Dosage, How to Take, Side Effects and Warnings

Verapamil serious side effects. Call your doctor at once if you have any of these serious side effects:

  • fast or slow heartbeats
  • feeling like you might pass out
  • fever, sore throat, and headache with a severe blistering, peeling, and red skin rash
  • restless muscle movements in your eyes, tongue, jaw, or neck
  • feeling short of breath, even with mild exertion
  • swelling, rapid weight gain
  • nausea, stomach pain, low fever, loss of appetite, dark urine, clay-colored stools, jaundice (yellowing of the skin or eyes)