Before prescribing this medicine, the risks of using it must be balanced against the benefits it will provide. This is a decision that must be discussed with a local doctor. In the case of this drug, it should be considered whether you have ever had any unusual or allergic reaction to this medicine or any other medicines. Also tell your local physician if you have any other types of allergies, such as to foods, dyes, preservatives, or animals. Although certain medications should not be used together at all, in other cases two different drugs may be used together even if an interaction might occur. In these cases, your local doctor may want to change the dose, or other precautions may be necessary. Tell your local doctor if you are taking any other prescription or nonprescription (over-the-counter [OTC]) medicine.