Benadryl Allergy/ Cold Side Effects, Before Using & Usefull Information

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Seek medical attention right away if any of these SEVERE side effects occur while taking acetaminophen / diphenhydramine / phenylephrine:

  • severe allergic reactions (rash; hives; itching; difficulty breathing; tightness in the chest; swelling of the mouth, face, lips, or tongue);
  • dark urine;
  • difficulty urinating or inability to urinate;
  • fast or irregular heartbeat;
  • hallucinations;
  • mood or mental changes;
  • pale stools;
  • seizures;
  • severe drowsiness;
  • severe or persistent dizziness, nervousness, lightheadedness, or headache;
  • severe or persistent trouble sleeping;
  • stomach pain;
  • tremor;
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