The normal limits of current and the effects they produce are as follows.
1mA - Slight Tingling Sensation
1mA -6mA- This is the let-go current when it is possible to let going of a live object.
9mA to 25 mA - Loss of Muscular control. In this range, it is not possible to let go of the live object
>25mA - Muscles controlling breathing are affected.
50 - 100mA - Fibrillation. The electric rhythm of the heart is disturbed. The heart stops. This is a life threatening condition.