Please Banana tea.... Is good, no major problem Also do following.... Wake up early go for morning walk in greenery daily with relaxed mind Do yogasanas and pranayam daily Do meditation regularly before going to sleep Put some cow ghee drops in both nostrils regularly before going to sleep.

Eating banana with Milk or tea is very harmful it creates lots of problems if taken regularly which are hard for corrections. Correct your diet and lifestyle and take Ayurveda medications to overcome this problem permently

If you are healthy then sleep comes on time at night. After a sound sleep at night morning you wake up spontaneously with out Alarm  bowel will be clear soon after wake up. Totally the feeling of light body and mind freshness experience will be there. For a healthy person  sleep inducing diet or drug are not needed. Generally before bed 2 hr. Prior food or liquid is advised.