Is it a good idea to take hydrocodone 5mg w/ olanzapan because there diagnosed schizophren phycosis?

There is a major interaction between Hydrocodone and Olanzapine, major meaning:

Major Highly clinically significant. Avoid combinations; the risk of the interaction outweighs the benefit.

Interactions between your drugs
Major
HYDROcodone OLANZapine
Applies to: hydrocodone, olanzapine

Using narcotic pain or cough medications together with other medications that also cause central nervous system depression such as OLANZapine can lead to serious side effects including respiratory distress, coma, and even death. Talk to your doctor if you have any questions or concerns. Your doctor may be able to prescribe alternatives that do not interact, or you may need a dose adjustment or more frequent monitoring to safely use both medications. Do not drink alcohol or self-medicate with these medications without your doctor's approval, and do not exceed the doses or frequency and duration of use prescribed by your doctor. Also, because these medications may cause dizziness, drowsiness, difficulty concentrating, and impairment in judgment, reaction speed and motor coordination, you should avoid driving or operating hazardous machinery until you know how they affect you.

Using narcotic pain or cough medications together with OLANZapine may also increase the risk of constipation. Severe complications may include intestinal obstruction, fecal impaction, or other serious and even life-threatening injuries to the bowel that may require hospitalization or surgery. You should maintain adequate hydration, physical activity, and fiber intake during treatment with these medications to help prevent constipation. Talk to your health care provider to see if taking a laxative prophylactically may be appropriate for you. Seek immediate medical attention if you experience signs and symptoms of constipation such as difficulty passing stool, incomplete passage of stool, hard or dry stool, and decreased bowel movement frequency (especially if less than three times a week), or if you have symptoms that could indicate more serious gastrointestinal problems such as nausea, vomiting, bloating, and abdominal pain or swelling. Prompt treatment with appropriate laxatives and other measures are essential to minimize the risk of complications. It is important to tell your doctor about all other medications you use, including vitamins and herbs. Do not stop using any medications without first talking to your doctor.

Report: https://www.drugs.com/interactions-check.php?drug_list=2874-0,1744-0

If both medications were prescribed by the same Dr., he/she most likely is aware of the potential major interaction and has outweighed that the benefit is greater than the risk, contrary to the warning given by the interaction report and would not put you in harms way.

If two different medical professionals are prescribing these meds and they are not aware you are taking one or the other, do not take the medications until you clarify the situation with both prescribers and last but not least, if you are self medicating, I strongly advice you not to do so.