Along with its needing effects, a drug may cause some unwanted effects. Although serious side effects occur rarely when this drug is taken as recommended, they may be more likely to occur if:
Get emergency help immediately if any of the following symptoms of overdose occur :
Clumsiness or unsteadiness; convulsions - seizures; drowsiness - severe; dryness of mouth, nose, or throat - severe; flushing or redness of face; hallucinations - seeing, hearing, or feeling things that are not there; headache - continuing; shortness of breath or troubled breathing; slow, fast, or irregular heartbeat; trouble in sleeping
For promethazine only
Muscle spasms - especially of neck and back; restlessness; shuffling walk; tic-like - jerky movements of head and face; trembling and shaking of hands
Always check with your family doctor as soon as possible if any of the following side effects was happen
Rare
Back, leg or stomach pain; black, sticky stools; bleeding gums; blood, cloudy or dark urine, or sudden decrease in amount of urine; blood pressure increased; blurred vision; chest pain; confusion; diarrhea; dizziness; faintness, or lightheadedness when getting up from a lying or sitting position; fever or chills; light-colored stools; mood or mental changes; nosebleeds; sore throat and fever; skin rash or hives; stillbirth; swollen mouth, throat, face, fingers, feet, glands or lower legs; sweating suddenly; tightness in chest; troubled breathing; twitching, twisting, or uncontrolled repetitive movements of face; unusual bleeding or bruising; unusual tiredness or weakness; vomiting of blood; weight gain suddenly; yellow or pale eyes or skin
More common side effects may occur that usually don't needed medical attention. These side effects may go away during treat as your body adjusts to the drug. However, check with your health care professional if any of the following side effects continue or are bothersome:
More common rare with loratadine-containing combination
Drowsiness; thickening of the bronchial secretions
Less common more common with high doses
Blurred vision; confusion; difficult or painful urination; dizziness; dryness of mouth, nose, or throat; headache; loss of appetite; nightmares; pounding heartbeat; ringing or buzzing in ears; skin rash; stomach upset or pain - more common with pyrilamine; unusual excitement, nervousness, restlessness, or irritability; unusual sleepiness, weakness or drowsiness, extreme tiredness
More common side effects not listed above may also occur in some diseaseds. If you have any other problems, check with your family doctor.