My friend can't keep food down past 7pm?

A friend of mine recently told me that due to a complication with allergies a few years ago, he is often unable to keep food down past a certain time. I was wondering what would cause this? I'd like to help or even get tips for how he can calm his stomach

Your friend should see his doctor for tests to find out what is going on with his stomach.

While waiting for an appointment,  a food diary would help to pinpoint problem foods and eating blandly.  Avoid rich, greasy and fatty food, eat little but often and eat earlier in the evening, avoiding eating past 7pm.

I'll let him know! Thank you

If diet change doesn't help, his doctor will be able to advise.