Is it okay to use alcohol astringent 2 times a day?

I just bought this new astringent its blue and i read in the ingredients that it has alcohol. However, it is for sensitive skin. I bought this because my skin is very oily (mostly on the t-zone) and i want my pores to look smaller. Im afraid of using astringents because i heard it can dry out your skin and cause really bad damage. My mom always tells me not to use these face stuff because later in life my skin will be damaged and they are just not good for you.