beattie my dd had classic colic, the late in the day inconsolable screaming for hours with the back arching and knee drawing up business. But on the basis that she always burped like a dream and never sickied up at all, we never considered that wind/reflux was an issue. Our HV suggested infacol and I was all set to run out and buy some till my husband got 15 mins on the internet and pointed out the NHS page showing it does nothing beyond placebo.
15 more minutes and he found the current state of play on colic (that in the majority of cases it is caused by over-stimulation - hence it builds during the day and recovers over night) and that there are a range of behavioural treatments that work beyond placebo. We also learned that our DD not napping at all during the day is not normal and leads to vast over-stimulation and that DD had several other indicators, including not playing with toys, screaming if she saw a person that wasn't me or dh, refusing to let anyone touch her hands etc.
So we changed everything around....we just said no to visits or leaving the house, we took away everything from her cot, DH and I had to avoid wearing bright colours or stripes etc, gave her her own space in a darkened room and spent hours and hours everyday trying to get her to settle and nap. Reducing the stimulation level to the point where napping happened coincided with the colic behaviour disappearing altogether, overnight.
Now of course not every baby exhibiting colic behaviour is over stimulated, and not every baby that is over stimulated could be treated successfully by the same intervention, but at least the behavioural approach HAS been demonstrated more effective than placebo.....and if I had followed the HV's advice I would have been trying infacol for 'a few weeks' (the period my HV suggested it might take to work - yeah - that would be because it doesn't actually work..and you have to wait for a random fluctuation to occur before declaring victory) before looking onwards for a real solution. If we had suffered another 3 weeks of that before finding out we had been conned we would have been seriously distressed.