For persons who had received such over-the-counter medication (i.e., those with a "yes" response in VIT2TNPMED), the complementary variable VIT2TNPMEDTI indicates whether they received such non-prescription medication before, at about the same time, or after they began taking the second vitamin supplement.

The survey question for VIT2TNPMED also collected information about the use of other conventional medical treatments (or no conventional treatment) for the condition for which the second vitamin supplement was used the most, including:

• Mental health counseling (VIT2TCOUN)

• Prescription medications (VIT2TPMED)

• Surgery (VIT2TSURG)

• Physical therapy (VIT2TPT)

• No conventional treatment (VIT2TNOCONV)

For respondents who had taken at least one vitamin supplement during the past 30 days (VITMOSUPNO) and had taken the first vitamin supplement to treat or cure a specific health problem or condition (VIT1TREAT), information was similarly collected on whether the person also received over-the-counter medication or other forms of conventional medical treatment for the condition for which they most used the first vitamin supplement (VIT1TCONMOST). See, for example, VIT1TNPMED.

For more information about the full range of variables related to vitamin, see VITANY and VITMO.