What is a normal dose of liquid morphine for a terminal cancer patient?

We used morphine 10mg every 4 hours around the clock plus haloperidol every 4 hours

Hi, I am a hospice nurse and the standard dose of liquid morphine to keep a pt comfortable is 5mg every 2 hours as needed for pain or shortness of breath. If the patient needs more the doctor will write a new order for around the clock dose. That is usually 5-10 mg every 3-4 hours. Plus a rescue dose every hour as needed. With brain tumors (in most cases I have seen) around the clock doses every 4 hours are prescribed, and a couple of rescue doses are also given for pain or shortness of breath. I hope this helps. Also, I am sorry about your mother...

I had epidural and in pain so I took 4 15mg of morphine because the loritab wasn't working is that to much

There is not an easy way to tell you a standard dose. It really depends on several factors such as previous opiate use, current tolerance to morphine, what are the patient's pain levels other medication on board ability to tolerate pain and the cause and type of the pain. It is very individual and somewhat of a trial an error process to get the pain under control while curtailing undesired sideffects.