
Quoting
Taxing Matters
The security guard works for the building management company, not your employer. Under the ADA, the employer is restricted in what it may disclose about your disability to others, so the guard should not have been told about your disability by the employer. If you never told the guard either, than he very likely had no idea you have a medical condition that might make it seem you are intoxicated. There’s nothing illegal in him reporting what he thought he saw to your employer. In any event, what the guard did would not be an ADA violation because the guard doesn’t work for your employer.
Your employer has a responsibility to not discriminate against you because of your disability. You have not indicated that anything negative was done by your employer as result of this. If the employer did not take any action against you over this then there is no ADA violation.