Answer
In the Name of Allah, Most Gracious, Most Merciful.
All praise and thanks are due to Allah, and peace and blessings be upon His Messenger.
In this fatwa:
Palliative care is permissible in Islam, in fact, it is recommended, because it aligns with its principles of mercy, compassion, and alleviating suffering.
Answering your question, The Assembly of Muslim Jurists of America, states:
Palliative care is permissible in Islam, in fact, it is recommended, because it aligns with its principles of mercy, compassion, and alleviating suffering.
The purpose of palliative care is to provide comfort and support during advanced illness, not to hasten death.
It is permissible for Muslim patients to take medications prescribed by the palliative care team to relieve pain and other symptoms, even if they contain some narcotic and sedative substances, as long as it is within the bounds of therapeutic necessity.
Spiritual care must be provided to Muslim patients, such as encouraging prayer, remembrance (Dhikr), recitation and listening to the Quran, and facing the Qiblah.
Muslims should strive to provide the necessary knowledge concerning this to the palliative care teams involved in the care of Muslim patients.
Additionally, communication between hospice facilities and Islamic centers should be enhanced.
Suicide and euthanasia are prohibited in Islam; it is not permissible for patients to engage in any act with the intention of ending life, nor is it permissible for doctors to assist in such acts.
Almighty Allah knows best.
Source: AMJA Online