Rabies vaccine can affect every individual in different ways. Feeling sick, diarrhea, swollen glands, joint pains and muscular pains are common side effects of rabies vaccine and affect more than 1 in every ten cases. These do not last long and go away on their own. Continue with the pain killer you have been taking. If they persist for few more days seek medical help. Hope you find this information useful. Do keep us posted.
Take care and good luck!
Where are you from that info comforted me. I'm on dose 2 and I haven't had solid stool and all types of crazy issues.