A person suffering from bipolar affective disorder experiences insomnia and requires sleeping pills. He is compelled to take the pills at 1:00 PM, which causes him to sleep until 9:00 PM, consequently missing the Asr and Maghrib prayers. If he is awakened for prayer, he cannot fall back asleep, which affects his university studies. He asks whether it is permissible for him to sleep until after the Isha prayer and then make up the missed prayers.

All praise is due to Allah. It is permissible to take the medicine you mentioned, but you must take measures to wake up for prayer on time, such as using an alarm clock or appointing someone to wake you. You must take measures if you know that you will not wake up until after the prayer time has elapsed. It is not permissible to neglect prayers under the pretext of mood disturbance or university studies. Among the greatest remedies for psychological illnesses is steadfastness in obeying Allah and His Messenger, and prayer is the greatest form of remembrance. Therefore, prayers must be maintained on time.