Hello,
The symptoms perfectly match with those of bipolar disorder. The childhood onset bipolar disorder is difficult to manage and is slow to respond to medicines. I would advice you to consult your nearest psychiatrist.
Your sister would require a mood stabiliser (may be a combination of two mood stabilizers) plus an antipsychotic (which would be decided by severity of her behavioural disturbance). I must tell you that the drugs would take some time to show their effect (may be upto one month in some cases).
The treatment would be given for atleast 6-9 months if this is the first episode of illness.
Thanks.

Hello thanks for asking from HCM

She is having symptoms like excessive optimism, grandiose ideas regarding power, decreased need for sleep, excessive activities, excessive and distractible thinking, racing thoughts flight of ideas, poor judgement, risk taking behaviour etc. These symptoms if we put together can become sufficient to make diagnosis of Mania in bipolar disorder. But she is 14 years old and as per my opinion psychiatric consultation is must to confirm diagnosis. Bipolar disorder can be treated with proper medicines.

Mood stabilisers are commonly used in BPAD. Commonly Sodium Valproate, Carbamazepine, Lamotrigine, Lithium Carbonate etc are used. In some patients atypical antipsychotics are needed. Olanzapine, Qutiapine, Risperidone etc are used. These medicines are prescription medicines and consult a Psychiatrist for proper prescription.

Thanks, hope this helps you