I have checked S’pore side, all the items are more expensive than M’sia. Some of the things are quite difference.
If really need, I buy Salonpas which is the cheapest, the difference should be the lowest. S’pore is selling S$2 & added 7% GST will equal to RM6.42. Which is higher than M’sia RM1.87. I think other items will be more than RM1.87