Final answer:
Controlled-release morphine, used in hospice care for conditions like breast cancer, typically provides pain relief for 8-12 hours.
Step-by-step explanation:
The duration of pain relief for controlled-release morphine, such as MS Contin which is often used in hospice care, is generally 8-12 hours. This type of medication is formulated to release the drug slowly over a set period, providing longer-lasting pain management suitable for conditions like breast cancer where constant pain relief may be necessary. When managing pain in a hospice setting, the goal is to maintain comfort, and using long-acting opioids like controlled-release morphine is a common practice.