How do people try to cheat a polygraph? A drug intoxication case and the myths

A polygraph test is no longer anything exotic. In Lviv, more and more families and companies are ordering a lie detector test for domestic staff, managers or candidates for positions of responsibility.

But what should you do if a candidate turns up for the test under the influence of drugs?
Can you cheat a polygraph with pills?
And who pays if the test is disrupted?

Let’s look at a real case and answer the questions clients most often type into Google.

A real case: screening a nanny before she starts work

A family came to us with a request:
“Screen a nanny before she starts work. We have suspicions and want to be sure”.

This is a standard polygraph screening procedure for candidates, especially when the job involves access to children, property and private information.

But already during the pre-test interview it became clear that something was wrong.

Need an actual test rather than theory? Take the VerifEye online test — from 2,500 UAH (≈ €50), with no visit to the office, or calculate the cost of a polygraph test.

The signs that raised concern:

• dilated pupils

• irregular breathing

• incoherent speech

• sudden mood swings

These are classic signs of drug intoxication in staff.

The test was stopped immediately.

And it is important to understand this: the problem is not the device.
The problem is the person’s condition.

Can you cheat a lie detector with pills?

One of the most popular Google searches:
“Can you cheat a lie detector with the help of pills?”

In short: practically no.

Let me explain in detail.

A polygraph records a whole set of reactions:

• heart rate

• changes in breathing

• the electrical conductivity of the skin

• autonomic fluctuations

When a person takes sedatives, alcohol or other substances:

• their background reactions become unstable

• the baseline is disrupted

• unnatural fluctuations appear

This does not “mask” a lie.
It creates an atypical picture that a professional polygraph examiner spots immediately.

A person in this state is not allowed to take the test.

And the very fact of turning up in an unfit state already answers the employer’s question.

How staff try to cheat the polygraph

The internet is full of tips:

• a tack or a needle in your shoe

• holding your breath

• biting your tongue

• special pills

Let’s go through them briefly.

🔹 “A tack in the shoe”

The aim is to cause pain during the comparison questions.

Reality: physical pain has a different physiological pattern from the emotional stress of lying.
An experienced specialist can see the difference.

🔹 Breath control

The systems analyse how well the readings are synchronised.
If the breathing is “artificial”, it does not match the other reactions.

Countermeasures usually show up on the charts.

🔹 Pills or alcohol

This is the most common attempt.

But it doesn’t work.

What’s more, the test will be stopped.

EyeDetect: what the system sees when a person “keeps a straight face”

The modern EyeDetect technology deserves a separate mention.

Unlike a classic polygraph, the system analyses:

• micro-movements of the eyes

• changes in the pupils

• cognitive load

Even if a person tries to “control their emotions”, the reaction of the pupils gives away their inner tension.

That is why EyeDetect is often used as an additional tool in polygraph screening of candidates in Lviv.

What to do if a candidate turns up drunk for a job interview or a test?

This is another popular search query.

The procedure is simple:

1. The unfit state is recorded.

2. Testing is stopped.

3. An official conclusion is drawn up.

4. The client receives a recommendation regarding the risks.

And now the key question.

Who pays for a disrupted test?

There is often a misunderstanding:

“The test didn’t take place, so why should I pay?”

A professional company’s answer is clear.

The specialist has:

• reserved the time

• done the preparation

• used the equipment

• blocked out the date

Sabotage or an unfit state on the part of the examinee is not the specialist’s fault.

The rules are clear:

If the test is disrupted through the examinee’s fault, the work must be paid for.

This is not harshness.
It is a business process.

And it is exactly this stance that earns the respect of serious clients.

How can you tell if a nanny is using drugs?

Watch out for:

• sudden mood swings

• problems concentrating

• strange facial expressions

• erratic behaviour

• frequent “disappearances”

But it is important to understand that suspicions are not proof.

That is why a polygraph test in Lviv lets you get an objective picture instead of acting on emotions.

Why turn to a professional polygraph examiner?

• it addresses real fears

• it shows what goes on “behind the scenes” among staff

• it shows that the employer means business

• it dispels myths

After contacting us, clients know the right approach:

• how to check staff for honesty

• what to do if they suspect something

• how to minimise risks

And they find solutions through high-quality polygraph examiner services.

What are you really paying for?

Not a test.

But:

• protection for your children

• business security

• prevention of information leaks

• detection of hidden addictions

• strategic security

For your own security, this is critical.

Summary

• It is practically impossible to fool a polygraph with pills.

• Countermeasures usually show up on the charts.

• A person who is intoxicated is not tested.

• Sabotage does not release anyone from paying for the specialist’s work.

• Testing is about minimising risks.

And if a candidate turns up for the test “high”, that already answers a lot of questions.

If you need:

• a polygraph test in Lviv

• a test in another city of Ukraine or in Europe — online or with a fellow polygraph examiner whom we recommend

• a lie detector test for domestic staff

• screening of candidates for positions of responsibility

— get in touch for a consultation.

Security starts with preventive decisions, not with investigations after something has gone wrong!

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