Pregnancy Home > PreNexa Side Effects

Based on side effects of the individual components of PreNexa, nausea, fatigue, and insomnia are some of the possible side effects of the prenatal vitamin. Since many of these side effects are also common problems seen in pregnant women, it can be difficult to tell if they are actually related to PreNexa use. If the side effects of this product are intolerable for you, talk to your healthcare provider.

An Introduction to PreNexa Side Effects

As with any medicine, side effects are possible with PreNexa® prenatal vitamins. However, not everyone who takes the medication will have problems. In fact, most people tolerate it quite well. If side effects do occur, in most cases, they are minor and either require no treatment or can easily be treated by you or your healthcare provider.
(This article covers many, but not all, of the possible side effects with PreNexa. Your healthcare provider can discuss a more complete list of PreNexa side effects with you.)

Possible Side Effects of PreNexa

Prenatal vitamins (even prescription-only prenatal vitamins) do not need the approval of the Food and Drug Administration (FDA), and they are usually not studied as thoroughly as other types of medications. Therefore, detailed information about the possible side effects of prenatal vitamins is not available. However, based on side effects of the individual components of PreNexa, the following side effects are possible:
  • Diarrhea or constipation
  • Nausea and vomiting
  • Gas or belching
  • Heartburn or indigestion
  • Intestinal cramps
  • Muscle aches and pains
  • Metallic taste in the mouth
  • Ringing in the ears (tinnitus)
  • Insomnia
  • Fatigue
  • Headaches
  • Yellow or orange discoloration of the urine
  • Loss of appetite.
As you can see, many of the possible side effects with PreNexa are also some of the common aches, pains, and annoyances that are common during pregnancy. Therefore, it can be difficult to tell if a particular problem is caused by PreNexa or by the pregnancy itself. However, if a side effect suddenly appears (or gets worse) when you start taking PreNexa, it may be reasonable to assume that the vitamin may be causing the problem.
If you find that PreNexa's side effects are intolerable for you, please ask your healthcare provider for assistance (rather than just stop taking the prenatal vitamin). It is important to get enough folic acid (and certain other vitamins and minerals) during pregnancy, and your healthcare provider may have some useful suggestions or may recommend trying a different prenatal vitamin.
Written by/reviewed by:
Last reviewed by: Kristi Monson, PharmD;
Last updated/reviewed:
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