Where can I find Plan B near Alton, NH? ~EMERGENCY~?

My friend had sex with a girl who said she was on birth control and- like an idiot- used no protection. Turns out she's not on birth control and they need the Plan B pill right away. I know the usual price is about $50 but is there anywhere near Alton that sells it for less? Please my friend is really stupid and is too baked to worry right now but this girl is trash and will ruin his life!!!!