Wiktionary
lose his mind
vb. (alternative form of lose one's mind English)
Usage examples of "lose his mind".
A short time thereafter Miss Rutledge was attacked with a fatal illness, and her death was such a blow to her intended husband that for a long time his friends feared that he would lose his mind.
The Arkonides, with their degenerate ideas, have made him lose his mind.
The last two days had dragged, moment bymoment, second by second, until he thought he would lose his mind.
The last two days had dragged, moment by moment, second by second, until he thought he would lose his mind.