Fig. 2.

Water uptake of medicated and non-medicated xanthan and carbopol patches. a Medicated carbopol film (cast volume = 30 ml, nicotine = 2 mg/cm²); b non-medicated xanthan film (cast volume = 20 ml); c medicated xanthan film (cast volume = 30 ml, nicotine = 3.75 mg/cm²); d medicated xanthan film (cast volume = 30 ml, nicotine = 2 mg/cm²); e non-medicated xanthan film (cast volume = 30 ml); f non-medicated xanthan film (cast volume = 40 ml); h non-medicated carbopol film (cast volume = 30 ml)