Table 3
Studies of OTC NRT versus prescription NRT
Study
Product
n
Randomised
Visits
Follow up (months)
Outcome
Biochemical verification
Korberly
et al
33
Patch
3235
Yes
5
12
Prolonged abstinence
Yes
Leischow
et al
34
Patch
300
Yes
5
12
Continuous abstinence
Yes
Shiffman
et al
32
Patch
2636
No
6
6
Continuous abstinence
Yes
Shiffman
et al
32
Gum
3136
No
6
6
Continuous abstinence
Yes