The confused condition causes a Pokémon to hurt itself in its confusion 50% of the time. The damage is done as if the Pokémon attacked itself with a 40-power typeless physical attack.
Confusion wears off after 1-4 attacking turns. This means that turns recharging, such as after using Hyper Beam, and turns unable to attack, such as from paralysis, will not lower the remaining number of turns of confusion. However, a sleeping Pokémon may hurt itself in confusion if using a move such as Snore or Sleep Talk.
so to your question the answer is no there isa 50% chance