If you're lucky then you find a deluxe chemistry set. You can also find ingredients to make stims/ super stims as well. I found myself hot-keying stims and using them quite often. I soooo regret not taking Remnants or T51-b.
Also btw the best place to buy stimpacks is New Vegas clinic.
Calamity at Jacobstown is the best place for stimpacks. After you have completed Doc Henry's quest Calamity refreshes her stock with around 30 stimpacks. Unless you mean the price of stimpacks is better at the Vegas Clinic.
Heheh, for anyone that has Dead Money, why not use the Vending Machine and the free vouchers you get? I've been able to get hundreds of Stimpacks at a pop.