One man died and four other people were taken to hospital with suspected heroin overdoses in just 48 hours, a hospital said.
It has prompted a warning from doctors about what they believe is a particularly potent batch of heroin being used in the area.
The medics say it is unusual to have so many separate cases of drugs overdoses in such a short space of time.
Olivia Paterson sent this report.
Doctors have issued a warning about a potentially-fatal batch of heroin which has killed one man and led to a significant increase in overdoses among drug users.
A total of five patients have been taken to Milton Keynes Hospital for treatment so far.
Emergency medicine consultant Vimal Desai said doctors would usually expect to see one or two overdose cases a week but had seen all five in just 48 hours at the end of last week.
He added: “The reaction suggests an overdose of heroin, which appears to be a lot more potent than normal.
"It slows down their breathing and knocks their consciousness-level down.
“We would like to warn anyone thinking of taking these drugs that it may be a more potent batch, which can have a much more detrimental effect and can be fatal.”
Police have confirmed they are investigating the death of a man.
Two people have been arrested in Luton after a car sped away from police and crashed in the Mangrove Road area.
Officers discovered cannabis in the car. They later searched a house in Linden Close in Dunstable and found cannabis plants being cultivated.
Frankie Dettori's solicitor has said that the jockey's positive test for a banned substance at Longchamp was not for a performance-enhancing drug.
Frankie Dettori, who lives in Newmarket, will face a hearing before the medical Committee of France Galop next week. His solicitor declined to name the substance in question.
A 31-year-old man from Bletchley who was part of a gang involved in a multi-million pound scheme to import the cutting agent benzocaine into the UK has been jailed for seven years.
Clifford Hall, of Whaddon Way, was found guilty of assisting in the supply of class A drugs, possession of a class B with intent to supply, possession of a class C drug with intent to supply and possession of a class C drug, following a trial at Preston Crown Court.
Hall was importing large amounts of benzocaine into the country from China, with the packages being delivered to Burnley and Ripley, in Derbyshire. The packages were then transported via Manchester back down to Milton Keynes.
A Norfolk company which has developed new technology to detect drug-use through people's fingerprints has been given almost half a million pounds to improve drug screening services in hospitals.
Intelligent Fingerprinting, a spin-out firm from the University of East Anglia, will use it to develop its technology.
A drug dealer from Cambridgeshire has been ordered to pay back £30,000 of his ill-gotten gains.
Keith Finch, who's 63 and comes from Wisbech, was jailed for two years for possession with intent to supply class A drugs at Cambridge Crown Court in April last year.
He admitted the charge but claimed he was looking after the drugs for another man.
Now he's been ordered to pay £30,000 in compensation. He has been given 12 months to pay or faces a further 12-month prison sentence.
Cannabis worth more than a quarter of a million pounds has been seized at the Port of Harwich.
The drugs were discovered by Border Force officers in the trailer of a lorry that arrived on a ferry from the Hook of Holland on Saturday.
The drugs had been concealed in 14 white boxes hidden among a load of flowers. In total, 117kg of cannabis was found.
A 62-year-old man from Holland has been arrested on suspicion of illegally importing a Class B drug.
An Essex lorry driver has been jailed for 12 years for smuggling around £3.8 million-worth of heroin, cocaine and ecstasy into the country via Dover.
Charlie Tomlinson, 31, of Melbourne Avenue, Chelmsford was arrested in Kent by UK Border Agency officers who scanned his vehicle.
They searched the lorry and trailer on August 2 last year and found drugs hidden in the space between the inner and outer roof of the trailer, a Border Force spokeswoman said.
Tomlinson was found guilty of smuggling class A drugs into the UK, following a trial at Maidstone Crown Court.
The Border Force spokeswoman said Tomlinson smuggled an estimate 23kg of heroin, valued at £2.1 million, 10kg of cocaine, valued at £1.7 million, and 23,000 ecstasy tablets worth £71,000.
This was sophisticated drugs concealment and shows the lengths criminals will go to in attempting to evade the UK's border controls. The sentence handed down today should act as a warning to those who attempt to smuggle illegal drugs into this country.
A man has been found guilty of conspiracy to supply Class A controlled drugs after the discovery of £30m of cocaine.
The cocaine had a street value of £34m and was Suffolk's largest seizure of Class A drugs.
Frederick Colverson, 56, Galsworthy Avenue, London was found guilty at Ipswich Crown Court.
He will be sentenced on 7th August, together with Terance Smith, 57, a Company Director from Ethelreda Drive, Thetford who pleaded guilty to the same charge at an earlier hearing.
They were arrested following months of intelligence gathering relating to smuggling cocaine through Felixstowe Docks
The discovery of £34m worth of cocaine will have a significant impact and disruption on drug activity and criminality taking place within Suffolk and wider areas of the country.