It is very important that your doctor check you closely while you are receiving this medicine. This will allow your doctor to see if the medicine is working properly and to decide if you should continue to receive it.
Check with your doctor right away if you or your child have bluish lips or skin; chest pain; difficulty with breathing; a fast, pounding, or irregular heartbeat or pulse; shortness of breath; or muscle stiffness after receiving this medicine.
Dizziness, lightheadedness, or fainting may occur with this medicine, especially when you get up suddenly from a lying or sitting position. Getting up slowly may help, but if the problem continues or gets worse, check with your doctor.
This medicine will add to the effects of other CNS depressants (medicines that make you drowsy or less alert). Some examples of CNS depressants are antihistamines or medicine for hay fever, allergies, or colds; sedatives, tranquilizers, or sleeping pills; prescription pain medicine or narcotics; barbiturates or medicine for seizures; muscle relaxants, or other anesthetics, including some dental anesthetics. Check with your medical doctor or dentist before taking any of the above while you or your child are receiving this medicine.