original: Riluzole does not reverse the damage already done to motor neurons, and patients taking the drug must be monitored for liver damage and other possible side effects.
simplifications: Riluzole doesn't undo damage already done to motor neurons.  Patients taking the drug must be monitored for liver damage and other possible side effects. Riluzole does not reverse the damage to neurons. So patients taking the drug must be checked for liver damage and other side effects. Riluzole doesn't reverse damage already done to neurons. Look for liver damage and other side effects in patients taking the drug. Riluzole does not undo the damage already done to motor neurons. Also, patients taking the drug must be monitored for liver damage and other side effects. Riluzole does not reverse damage already done to motor neurons. Patients taking the drug must be monitored for liver damage and other side effects. Riluzole will not reverse the damage already done to motor neurons, however,  patients taking the drug must be monitored for liver damage and side effects. Riluzole does not undo the damage to motor neurons. Patients who take it need to be watched for liver damage and other side effects. Riluzole does not reverse previous damage to motor neurons. Patients taking the drug must be checked for liver damage and other side effects. Riluzole doesn't fix damage done to motor neurons, and those taking the drug must be checked for liver damage and other possible side effects. Riluzole does not undo the damage that is already done to motor neurons, and patients taking the drug must be monitored for liver damage and other side effects.