Husband not interested in having children

Q: I want to know about azal in Islam as my husband don't want to have children from marriage up till now, which is 8 years already. He don't want children  for the next 5-6 years and is insisting that I take family planning medicine but I dont want to take it because it is affecting my body badly and I get sick very fast from them. What is the right of the wife in this situation? Should I live with him or separate?