Pregnancy Home > PremesisRx Side Effects

It is not exactly known what side effects PremesisRx will cause, because the prenatal vitamins have not been extensively studied. However, based on the side effects of the individual components of PremesisRx, side effects may include headaches, nausea, and drowsiness. Notify your healthcare provider immediately if you experience more serious side effects (such as severe nausea or vomiting, severe constipation, or signs of an allergic reaction).

An Introduction to PremesisRx Side Effects

(PremesisRx is no longer being manufactured and should no longer be sold in the United States. Please consult your healthcare provider for further information.)


As with any medicine, side effects are possible with PremesisRx®. However, not everyone who takes the prenatal vitamins will experience side effects. In fact, most people tolerate them 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 PremesisRx. Your healthcare provider can discuss a more complete list of PremesisRx side effects with you.)

Possible Side Effects of PremesisRx

Because prenatal vitamins do not need FDA approval, they are usually not studied as extensively as other types of medications. As a result, detailed information about the possible side effects of prenatal vitamins is not available. However, based on the side effects of the individual components of PremesisRx, the following side effects are possible:
  • Nausea
  • Vomiting
  • Abdominal pain (stomach pain)
  • Headaches
  • Drowsiness
  • Sensitivity to the sun
  • Constipation.
As you can see, many of the possible PremesisRx side effects are also some of the common aches, pains, and annoyances that can occur during pregnancy. Therefore, it can be difficult to tell whether PremesisRx (or the pregnancy itself) is causing a particular side effect.
Written by/reviewed by:
Last reviewed by: Kristi Monson, PharmD;
Last updated/reviewed:
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