I made a transit at Changi last month. In my hand luggage I brought a 330 ml Alcon solution to use in-flight. It was confiscated at security.

I argued that this was considered medicine and allowed in other countries - and even a supervisor came - but they would not bent; I got the usual answer for this country: "I am so sorry Sir, but we cant do that"

Perhabs I should add that I passed with the same bottle through IST, HKG, BKK, NRT and ICN on this trip without problems...

Changi