Cetirizine diHCl: Headache, drowsiness/sleepiness, dry mouth, sore throat, coughing, bronchospasm, epistaxis, stomach pain, diarrhea, nausea & vomiting. Phenylephrine HCl: Tremor, restlessness, anxiety, nervousness, dizziness, high BP, rapid & irregular pulse, weakness, nausea, vomiting & sweating.