Brompheniramine may cause side effects. Tell your doctor if any of these symptoms are severe or do not go away:
drowsiness
dry mouth, nose, and throat
nausea
headache
chest congestion
Chlorpheniramine may cause side effects. Tell your doctor if any of these symptoms are severe or do not go away:
drowsiness
dry mouth, nose, and throat
nausea
vomiting
loss of appetite
constipation
headache
increased chest congestion