<p>It depends on what you want to do. I am in grad school. I have had numerous potential mentors ask about my P chem background and say I should have taken it. Some departments also require grad students to take it. If you want to do anything with any sort of biochemistry, you will probably need it. I would not be suprised if neuro PIs also wanted it, but they may be more flexible about it.</p>
<p>If you have problems with math, you may want to take it. Another option would be to audit the class. This way you can learn the subject without the stress of grades. Some PIs may want the grade.</p>