Do you agree that bipolar - mania - psychosis, can cause people who are normally honest and trustworthy to lie and be deceitful ?

I read the following on the ehow websit :-

During periods of depression or mania, people with bipolar disorder may do things they are not proud of, and lies are often told to excuse this behavior. Stealing, lying and even promiscuity are not uncommon; when these behaviors take place during one of their episodes, they may feel it necessary to tell lies to cover up their wrongdoing.

Lying to Cover Impulsivity

According to the National Institute of Mental Health, one of the main characteristics of a bipolar individual is impulsive behavior. Impulsive behavior often results in shame, as it involves performing actions without much forethought.Aquestionable situations now and again. During periods of depression or mania, people with bipolar disorder may do things they are not proud of, and lies are often told to excuse this behavior. Stealing, lying and even promiscuity are not uncommon; when these behaviors take place during one of their episodes, they may feel it necessary to tell lies to cover up their wrongdoing.

According to the National Institute of Mental Health, one of the main characteristics of a bipolar individual is impulsive behavior. Impulsive behavior often results in shame, as it involves performing actions without much forethought. According to Derek Wood at Mental-Health-Matters.com, "Bipolar Disorder can be associated with low serotonin levels, which has been implicated in impulsivity, which...makes a person more prone to lie." The lies that are told as a result of the bipolar condition vary on a case-by-case basis. Some lies are harmless and others can be devastating.

According to Derek Wood at Mental-Health-Matters.com, "Bipolar Disorder can be associated with low serotonin levels, which has been implicated in impulsivity, which...makes a person more prone to lie." If you are living or dealing with a person who suffers from the mental condition, don't be surprised to discover that your loved one is telling falsehoods in an attempt to cover up impulsive, regrettable actions. In the end, he may have no other way to explain his actions.

MY QUESTION:-
Do you agree that the various extremes of bipolar and psychosis can cause somebody who had previously been honest snd trustworthy to become deceitful and tell lies ?