You may try with about 5% cetostearyl alcohol and  remaining white petrolatum gel

You should do an optimization process. First, you have to choose the best gelling agent in order to get a stable gel. For example, you may try to make gelss with different kind of gelling agent. After you get the best gelling agent, you may try different concentration in order to get the optimum formula. Then, you may add some excipients to prevent drug oxidation or degradation. 

Thanks for your answers Christopher and Delly. However, I wanted to know if someone has already worked on this product before to make a stable gel of aceclofenac.

Dear Raj, here is a link about aceclofenac gel formulation using carbopols gel Base. Might this article assist you.

http://www.sciencedirect.com/science/article/pii/S0927776511007417

Dear Delly,

thanks a lot for the link but I can not access the complete link as it is payable. I'm only able to go through its abstract. Please download and send me the full text if you have access to it.

Thanks

Abhishek

Here are the articles. Fortunately, I still have a little time to access the full article. May these articles helps you.

I would use carbomer 940 as a gelling agent with triethanolamine as a neutralizing agent. I would also add ethanol and glycerin.  Good Luck!

Thanks Ahmed

I agree with Ahmed Agiba, I used Carbopol 940 for my undergraduate and master research. The gel prepared were stable for several months.