Will abilify and lexapro give a false positive for methamphetamine?

It is very unlikely for Abilify to cause a false positive on a drug screen for any other substance. Drug screens test for metabolites of specific drugs. All drug tests have a rating based on specificity and sensitivity. The higher the sensitivity, the lower the specificity. Basically it is only possible to have a false positive by using another drug that is very chemically similar to the positive test. Abilify (aripiprazole) is not chemically similar to commonly screened drugs of abuse.