I think I'm getting the hang of this drug now.
The consultant said it should be taken about three hours before going out to a meal. I reckon between 12 and 24 hours is more like it.
Yesterday I went to a function and was surprised to find canapes - that's snacks - being served in generous proportions. I hadn't eaten and was hungry so I took what I could.
This included rice balls, fish of various kinds and chocolate eclairs. Also something with a little roll of beef in it. The fish had lots of lemon in it - and I try to avoid lemon. I took the pill afterwards and then searched for something edible at a railway station.
At Marks and Spencer I found a sandwich made of Wensleydale cheese, lettuce and caramelised carrot chutney. That seems innocent enough.
There were some fairly unpleasant effects in the hours immediately following this adventure and I had to spend some time in the bathroom. But today I have been fine - no itching and my skin in pretty good condition. I can only attribute it to the Singulair - impressive even if it takes a while. And the side-effects are much fewer than with anti-histamines. No deep sleeping, weird dreams or "hangover".