Can we use a makruh for pleasure without getting sinful?

As Salam o Alikum brothers and sisters in faith. I have been suffering from a medical condition for 6 years now. When it first started, I had to visit so many medical experts but their prescriptions failed to give the required results. After 3 years of serious medication, I had to move on to something new that could calm my nerves. That thing was THC, particularly obtained from hash. It has been proven to be a good source of relief (All praise to Allah). Now I don't need it often because I feel better. So if I keep using Hash rather for the recreational purpose, would it be Legal in Islamic shariah or not?