Health Queries about Fiberlact Syrup 180ml

Is it safe to take a liquid paraffin + milk of magnesia laxative syrup instead of this Ispaghula 3.5gm + Lactitol 10gm Syrup for stomach pain and constipation?

These two are not the same composition, so they aren't like-for-like substitutes. This syrup combines a bulk-forming fibre (ispaghula) with an osmotic laxative ...