He hath only forbidden you dead meat, and blood, and the flesh of swine, and that on which any other name hath been invoked besides that of Allah. But if one is forced by necessity, without wilful disobedience, nor transgressing due limits,- then is he guiltless. For Allah is Oft-forgiving Most Merciful.
See the book “The Lawful and Prohibited in Islam” by Yusuf Al Qaradawi chapter 2 pg. 37-60