A Study to Evaluate the Safety, Tolerability and Plasma Concentration Profiles of MK0633 in Asthmatic Children Aged 12 to Less Than 16 Years (0633-019)

Inclusion Criteria: * Patient is judged to be in good health, other than having mild to moderate asthma, based on medical history, physical examination, vital signs, and laboratory safety tests * Patient has no clinically significant abnormality on electrocardiogram (ECG) performed at the prestudy (screening) visit and/or prior to administration of the initial dose of study drug * Patient has at least 1 year of mild-to-moderate asthma * Patient has been a nonsmoker for at least 6 months * Patients of childbearing potential must agree to use a medically acceptable method of contraception during the study and for 90 days after the last dose of study drug * Patients must be able to swallow tablets Exclusion Criteria: * Patient has a history of clinically significant endocrine, gastrointestinal, cardiovascular, hematological, hepatic, immunological, renal, respiratory, other than asthma, or genitourinary abnormalities or diseases * Patient has required a visit to a hospital or emergency room due to an asthma exacerbation within 3 months of the prestudy visit * Patient has unresolved signs and symptoms of an upper respiratory tract infection (URI) or has had had an upper respiratory tract infection within 3 weeks prior to the prestudy visit * Patient has a history of stroke, chronic seizures, or major neurological disorder * Patient has a history of neoplastic disease * Use of theophylline, Singulair (montelukast), Xolair (omalizumab), Zyflo amd Zyflo CR (zileuton), oral corticosteroids and oral beta agonists are excluded approximately 2 weeks prior to administration of study drug and throughout the study * Patient consumes alcoholic beverages