Apomorphine is so named because it's a degradation product of morphine, it's the end product when you boil morphine with strong acids
There's no opioid activity and instead it acts as an agonist of dopamine receptors. I think William Burroughs reccomended it for a sort of aversion therapy to treat opioid use?
One of the major effects it causes, due to stimulating dopamine receptors in the chemoreceptor trigger zone, is a powerful emetic effect. Veterinarians sometimes will use it to make cats and dogs puke up things that they shouldn't have in their stomach.
No recreational value at all.