Take delantin e ery day but my levels are 3.4 what could be causing my levels to be low?

Dose: Sometimes low levels are due to inadequate dose and/or inferior generic brands of the dilantin. If you are still having problems attaining the desired level, make sure to try brand name dilantin. Some patients metabolize the Dilantin differently and require high doses. In your age bracket it is important to avoid high levels however. Your neurologist should advise you.