Is it possible to divide in half Trazodone Neuraxpharm 50 mg?

Hello. Dad is prescribed for sleep improvement Trazodone Neuraxpharm 50mg with a dosage of half a tablet while in the leaflet it reads: "50 mg tablets: The dividing line on the tablet is not intended to break the tablet." Does the above statement mean that the tablet cannot be broken, but can be treated with a guillotine, or that breaking the tablet will negatively affect the effect of the drug and is absolutely contraindicated?