PerryJo,
This is from the Texas CHL website, see the last paragraph, exactly what Kompact9 says.
An applicant must not have, during the preceding five years received treatment by, been committed to, or resided in any drug treatment program. "Chemically dependent person" means a person who frequently or repeatedly becomes intoxicated by excessive indulgence in alcohol or uses controlled substances or dangerous drugs so as to acquire a fixed habit and an involuntary tendency to become intoxicated or use those substances as often as the opportunity is presented.
An individual who has been convicted two times within the 10-year period preceding the date on which the person applies for a license of an offense of the grade of Class B misdemeanor or greater that involves the use of alcohol or a controlled substance as a statutory element of the offense is a chemically dependent person for purposes of this section and is not qualified to receive a license under this subchapter. This subsection does not preclude the disqualification of an individual for being a chemically dependent person if other evidence exists to show that the person is a chemically dependent person.
More Info #5
A person is incapable of exercising sound judgment with respect to the proper use and storage of a handgun if:
The person has been diagnosed by a licensed physician as suffering from a psychiatric disorder or condition that causes or is likely to cause substantial impairment in judgment, mood, perception, impulse control, or intellectual ability;
The person suffers from a psychiatric disorder or condition described by Paragraph (A) of this subdivision that:
Is in remission but is reasonably likely to redevelop at a future time; or
Requires continuous medical treatment to avoid redevelopment;
The person has been diagnosed by a licensed physician or declared by a court to be incompetent to manage the person's own affairs; or
The person has entered, in any criminal proceeding, a plea of not guilty by reason of insanity.
The following are evidence that a person has a psychiatric disorder or condition described by Subdivision (1)(A) of this subsection:
Involuntary psychiatric hospitalization in the preceding five-year period;
Psychiatric hospitalization in the preceding two-year period;
Inpatient or residential substance abuse treatment in the preceding five-year period;
Diagnosis in the preceding five-year period by a licensed physician that the person is dependent on alcohol, a controlled substance, or a similar substance; or
Diagnosis at any time by a licensed physician that the person suffers or has suffered from a psychiatric disorder or condition consisting of or relating to:
Schizophrenia or delusional disorder;
Bipolar disorder;
Chronic dementia, whether caused by illness, brain defect, or brain injury;
Dissociative identity disorder;
Intermittent explosive disorder; or
Antisocial personality disorder.
Notwithstanding Subdivision (1), a person who has previously been diagnosed as suffering from a psychiatric disorder or condition described by Subdivision (1) or listed in Subdivision (2) is not because of that disorder or condition incapable of exercising sound judgment with respect to the proper use and storage of a handgun if the person provides the department with a certificate from a licensed physician whose primary practice is in the field of psychiatry stating that the psychiatric disorder or condition is in remission and is not reasonably likely to develop at a future time.