Long-term, Safety and Tolerability Study of AFQ056 in Adolescent Patients With Fragile X Syndrome (Open-label)

Inclusion Criteria:

- Group 1 patients:

- Must have completed study CAFQ056B2214 or another study of AFQ056 which included FXS
patients below 18 years of age within one week of enrollment into the open-label
study.

- Has a caregiver or caregivers who spend, on average, at least 6 hours per day with
the patient , who is willing to and capable of supervising treatment, providing input
into efficacy and safety assessments, and accompanying the patient to study visits.

- Group 2 patients:

- Must meet one of the following conditions:

- Completed Study CAFQ056B2131

- Completed Study CAFQ056B2214 or another study of AFQ056 which included FXS patients
below 18 years of age but enrollment into the current study was delayed for more than
a week.

- Discontinued prematurely from Study CAFQ056B2214 or another study of AFQ056 which
included FXS patients below 18 years of age due to intolerability of the dosage in
the patient's assigned treatment group.

- Has a caregiver or caregivers who spend, on average, at least 6 hours per day with
the patient , who is willing to and capable of supervising treatment, providing input
into efficacy and safety assessments, and accompanying the patient to study visits.

Exclusion Criteria:

- Discontinuation from Study CAFQ056B2214 or CAFQ056B2131 or another study of AFQ056
which included FXS patients below 18 years of age due to safety reasons

- Female patients who are sexually active at any time during the study

- Any advanced, severe or unstable disease

- History and/or presence of schizophrenia, bipolar disease, psychosis, confusional
states and/or repeated hallucinations as per DSM-IV criteria

- History of suicidal behavior or considered a high suicidal risk

- History of severe self-injurious behavior

- History of uncontrolled seizure disorder or resistant to therapy within the past 2
years (Patients who are clinically stable under anti-convulsant therapy for the past
2 years are not excluded)

- History of clinically significant allergies requiring hospitalization or non-inhaled
corticosteroid therapy (asthma, anaphylaxis, etc.)

- History of malignancy of any organ system (other than localized basal cell carcinoma
of the skin), treated or untreated, within the past 5 years, regardless of whether or
not there is evidence of local recurrence or metastases

- Patients who are using (or used within 6 weeks before baseline) digoxin or warfarin

- Using (or used within 6 weeks before baseline) concomitant medications that are
potent inhibitors or inducers of CYP3A4

- Using glutamatergic agents (riluzole, memantine, etc.) or lithium within 6 weeks of
baseline

Other protocol-defined inclusion/exclusion criteria may apply.