An "aggressive" motorist will spend more than four years behind bars for killing a cyclist while driving under the influence of "a cocktail of illicit drugs".
Respected Adelaide GP Byron Gordon was on a morning bike ride at Henley Beach on New Year's Day in 2021, when he was struck by Darren James White.
Judge Emily Telfer told the court White had methamphetamine, MDMA, cocaine and cannabis in his system when he swerved onto the wrong side of the road and hit Dr Gordon who was riding in the opposite direction.
The court heard White's vehicle propelled Dr Gordon forward, before he mounted the curb then crashed into a tree and stobie pole.
White remained at the scene, but did not assist the injured doctor.
"Despite the best efforts of people who were first on the scene and ambulance officers who attended subsequently, Dr Gordon passed away at the scene of the collision."
Judge Telfer described the victim, Dr Gordon as a much-loved father, brother, friend and husband.
"It is clear that the death of Doctor Gordon has left an enormous hole in their lives," Judge Telfer said.
"He was a man who had worked hard throughout his life to help other people and he was looking forward to enjoying the fruits of that hard work as he slowed down in his working life.
"Your actions and decisions have deprived him and his family of his entitlement."
The 52-year-old was sentenced to five years and six months' imprisonment.
White received a 5 per cent discount on that sentence due to his guilty plea which saw the sentence reduced to five years, two months and 22 days.
Judge Telfer set his non-parole period at four years, two months and six days and disqualified his drivers licence for 15 years.
The judge told the court that she accepted White was deeply remorseful for his actions.
"It is clear that the decision you made on the morning of the first of January to drive your car was an aberration in an otherwise law-abiding life," Judge Telfer said.
"Clearly you feel the weight of what you have done heavily."
