And it may take several tries before your doctor can identify an effective medicine or combination of medicines for your child's conditions.

Ongoing treatment is designed to find a medicine or combination of medicines that keeps Crohn's disease in remission.

Your child may have to try several medicines or combinations of medicines before finding what works best.

It may take some time to find the right medicine or combination of medicines that best controls your child's symptoms.

Sometimes these changes make the virus resistant to a particular medicine or class of medicines, which means the medicine is no longer effective against the virus.

If blood pressure is not controlled, your doctor may change the dosage or try a different medicine or combination of medicines.

Sometimes these changes make the virus resistant to a particular medicine or class of medicines.

The amount of medicine and number of medicines are increased in steps.

You may need to try different medicines or combinations of medicines before finding the one that best relieves your symptoms.

You may have to try several medicines or combinations of medicines before you find out what works best for you.