Are there anything to take to make leg to walk more though.

Enlist the help of the other leg. They work best in tandem.

That don't work? Use a horse crop. Show the lazy leg who's boss.

Thanks for the advice. I was wondering if there is any kind of medication to take for it.

To take for what? I assume that English isn't your first language but what you wrote in the OP? Makes absolutely NO SENSE AT ALL.

To take for my leg condition.

I doubt such medicine exists, but even if it did, I wouldn't make a suggestion for anything based on the vague opening post. Medicines tend to have side effects after all.
If your leg tires easy, especially compared to the other leg, perhaps you should look and see if you walk correctly(perhaps you lean too much on one leg, since one is shorter than the other). Perhaps your shoes are to blame. Exercise might help too.