is a pretty common problem.However if you are not comfortable taking pills there are other methods like using condoms with anaestetic agent,using multiple condoms or even engaging in prolonged foreplay and start-stop technique.Diverting your mind away from sex also helps to prolong.
You should also know that many new generation drugs are available which may be used only when needed and has low side effect profile.
So do visit a urologist
and get info
All the best