Alternative.....I'm all about herbal remedies instead of medicating the child when it can be easily fixed. I'm assuming that you aren't breastfeeding (if you are, lay off the cow's milk...biggest culprit with colicky babies). A lot of babies, just can't handle milk derived from a cow, it taxes their system way too much.
I'd take him to a chiropractor. Make sure that they do babies. Most of the time, this helps out a LOT! When I brought my last baby home, I called our chiropractor and he came over and adjusted her. The oncall pediatrician was doing something to her and she heard her 'pop' and mentioned it. Well, hello doc....if you try to bend her the way you did, of course. Anyway, the chiropractor got her back aligned in just a minute.
You and baby (which is painful) don't have to live with colicky babies and you can actually fix the problem instead of 'masking' them with medication.
Also, there is something called Kid-E-Col that you can use to help aid in this. I buy it online, but you can also go and get a different brand from a local health food store. www.worldhealthdepot.com is where I would order the Kid-E-Col from. But to get something faster, you can go to a wonderful, wonderful, health food store and get some help from them at "Good Nutrition". There is one off of Beaver Ruin and one off of McGinnis Ferry. Good luck! I hope baby feels better soon! That can be quite painful!