listen to the the gym leader with the Pokemon dip wad
Surf to Cianwood and visit the pharmacy there.
behind your pokemons
if you mean the medicine for 'amphy' in the light house, go to the medicine man in cianwood city he will give you a 'secret potion'
go to cianwood pharmacy hope that helped
You must go to the pharmacy in cainwood city.
surf to cianwood city and talk to the pharmacisthe will give you the medicine
find a way to them talk to jasmine get out of the lighthouse go back to cianwood city and go to the pharmacy talk to the guy and he will give you the medicine
Surf to cianwood city then find the medicine shop.
secret potion. you can find it at the olivine city in that medicine shop.
You must go get some medicine for her from cainwood, and bring it to her at the top of the lighthouse. Then she will return to her gym.
Go back to Olivine City and give the medicine to Jasmine. Then fight her at the gym.
go to cianwood city and talk to the man in the pharmacy(it's the house next to the sign)
go to that city in the bottom left of your map that has the safari zone entrance place and go in the pharmacy place and but medicine for it.