It has been criticised by the Royal College of Midwives, the Royal College of Nurses and the British Medical Association and local politicians.
Meanwhile, both the Royal College of Nursing and British Medical Association have cautiously welcomed the changes.
The British Medical Association, Royal College of Nursing and road safety charity Brake are among groups supporting the move.
On Thursday night the academy held talks with the three major unions - the British Medical Association, Royal College of Nursing and Royal College of Midwives.
They also said the move would go against the advice of Betsi Cadwaladr's own clinical reference group, as well as the British Medical Association, Royal College of Nursing and Royal College of Midwifery.
Only last month 20 organisations, including patient groups such as Age UK and the Alzheimer's Society and medical organisations like the British Medical Association and Royal College of Physicians, put their names to a joint statement criticising the "often inaccurate" coverage the issue was getting.
Unions, including the British Medical Association, the Royal College of Nursing and the Royal College of Midwives are among those who also want it to be withdrawn.
In recent weeks the British Medical Association, the Royal College of Nursing and the Chief Medical Officer have urged the government to outlaw smoking in pubs, restaurants and workplaces.
The guidelines have been prepared in consultation with the Mental After Care Association, mental health charity Mind, the National Schizophrenia Fellowship, the British Medical Association, public service union Unison, the Royal College of Nursing and the Royal College of General Practitioners.
It is written by experts from the Royal College of Paediatrics and Child Health, the Neonatal and Paediatric Pharmacists Group, the British Medical Association and the Royal Pharmaceutical Society of Great Britain.
Semir Zeki is a British Professor of Neuroesthetics at the University College London (UCL), a Fellow of the Royal Society and a Foreign Member of the American Philosophical Society.
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