Maynard was killed in the early hours of June 18 after he was electrocuted and hit by a tube train near Wimbledon Park station. Maynard had been trying to evade police after abandoning his car, and a Westminster Coroners' Court was told last week that he was four-times the legal alcohol limit to drive and that he had also taken cocaine and ecstasy on the night of the accident.
A post-mortem report also revealed the 23-year-old had used cocaine for at least three-and-a-half months. "We have a drug-testing regime in cricket like those in all professional sports which is primarily focused on detecting performance-enhancing drugs for very obvious reasons," Porter told BBC Radio Five Live Sport.
In the wake of the findings the PCA have begun talks with the England and Wales Cricket Board to increase the levels of drug-testing - which would also include out-of-competition samples.
While Porter said Maynard's recreational drug use would have been detected under the current policy - which focuses on performance-enhancing drugs - he confirmed the Surrey batsman had not been tested last season.
Porter added: "The pattern of drug use in Tom's case suggests he would have been picked up by our existing drugs programme. Although the use of recreational drugs outside of competition is not a breach of the anti-doping code, use in competition is a breach.
"So he would have tested for recreational drugs had he been tested in competition. Unfortunately given that is a random process he wasn't tested last year."
Porter confirmed talks with the ECB to initiate out-of-competition testing were ongoing and that 'hair sampling' was likely to now be used to catch recreational drug users.
"We're in advanced discussions with the England and Wales Cricket Board about implementing a testing programme for drugs out of competition and almost certainly using hair sampling," he said. "As the coroner identified that gives you a longer history and a more certain test.
"We need to be clear we are talking about testing, not to catch cheats, but testing to find people who have a drugs problem. Therefore, it will be linked with a confidential programme of help, support, advice and if necessary treatment to get them back on the right path."
