I have recovered several fish over the years with duck lips by simply lowering or turning off the heater and doing water changes.
Keeping antibiotic or any medication on hand or at all time may not be a good idea because many medication has expiration date. Once I used my handy Malachite Green to treat a simple ick outbreak, and ended up losing all the fish and later realized that my MG is 10 year old.
Duck lip is a virulent bacterial infection, the same bacteria can manefest itself in swollen eyes, tumor or ulcers on the head, and kill quickly.
It's a myth that ick or columnaris exist in every tank waiting to attack when the condition is right. Parasites that cause bloat are, not ick or duck lip.