Police arrested a man using amphetamine to help beat his heroin habit.
Mark Simpson (41), of The Reservoir, Surfleet, was spoken to in Haverfield Road, Spalding, on May 28 when he was in his Peugeot.
He admitted to police that powder in his possession was the class B controlled drug, amphetamine.
Shelley Wilson, prosecuting, said the 2.5 grammes of the substance was all that was left from the eighth of an ounce he had bought for £25.
Solicitor Rachel Stevens, mitigating, said Simpson suffered the loss of his father in recent years and that had affected him very badly.
He suffered severe depression, fell out of work and started to use heroin.
Miss Stevens said Simpson has conquered his heroin addiction, and has been clean for about six months, but had been using amphetamine as a crutch while sorting out his heroin habit.
She said he was no stranger to the court, but it had been two years since his last appearance.
Spalding magistrates on Thursday fined Simpson £65 and ordered him to pay £85 costs and a £20 victim surcharge when he admitted having the drug.