First and foremost – don’t panic and lose your temperament when stopped by police.
Be polite and respectful to the police and that will make any experience you have during that particular encounter, going forward, less stressful for you and the officer.
As the good lawyer said, keep your mouth closed and don’t make any admission of your involvement in any criminal offense. This includes admitting to the crime of driving while under the influence of drugs & driving while intoxicated. Most importantly, be polite and decent with officer. The last thing you need is repercussions for giving the public servant a hard time.
If you have respectfully declined all attempts from the officer to get you to incriminate yourself and he keeps bugging you, ask him to allow you to contact your lawyer so he can direct his questions to correct party. Your lawyer is best qualified to speak on your behalf with the police, let them handle it.