The distribution function and power deposition during ICRHin a tokamak plasma are analysed. The importance of self-consistentcalculations and the formation of non-standard drift orbits are addressed.It is found that for high power ICRH, the presence of non-standardorbits are crucial for describing the distribution function.For a standard minority heating scenario with the ion cyclotron resonance located at the high field side, the absorption ofthe wave power is shifted to the low field side (LFS) because of the orbit topologyand the evolving wave field profile.The high energy tail of the distribution function of theresonating ions is found to be dominated by ions inpassing orbits, of which some reside completely on the LFS of the tokamak.