mineral oil is what paraffin is called in North America - it is edible and is commonly used as a laxative - it is used on wooden kitchen utensils, bowls, chopping boards as it has no scent.

If you don't know how it is used as a laxative, or what a laxative is, google it. It's quite common.

Bought Paraffin oil at Megamart yesterday but it is available widely in Doha at Hypermarkets and probably pharmacies too.