What is the ruling on working in drug trafficking to support one's family and meet their needs, given the absence of other employment opportunities?

It is not permissible for a Muslim to work in selling narcotics or any forbidden work, even if the intention is noble, for the end does not justify the means, and there is no good in unlawful earnings. A Muslim must fear Allah and be patient, for Allah will make a way out for him and provide for him from where he does not expect.