Vomiting during Pregnancy (Hyperemesis Gravidarum): Drug Therapy

Therapeutic target

Improvement of symptomatology

Therapy recommendations

  • The following are therapy recommendations according to severity.

Severity 1

  • Nutritional counseling ev. dietary changes:
    • Low-fat
    • High in carbohydrates
  • Frequent small meals
  • Morning meal lying in bed
  • Avoid:
    • Acidic foods
    • Unpleasant odors
  • Psychosomatic care, if necessary
  • Drug therapy with antiemetics

Severity 2

  • Early inpatient admission
    • Elimination of possible emesis (vomiting)-inducing stimuli by absolute food abstinence
    • Electrolyte substitution (sodium, potassium, calcium).
    • Volume substitution about 3,000 ml/die (eg,1,500 ml Ringer’s solution + 1,500 ml glucose solution 5-10% + multivitamin administration).
    • Parenteral delivery of carbohydrate and amino acid solution (about 8,000-10,000 kJ/die).
    • Antiemetics (drugs against nausea and vomiting, see below).
    • Evtl.Sedatives

These therapeutic measures can be reduced with the simultaneous onset of a slow diet, after compensation for exsiccosis (dehydration), as well as electrolyte and other metabolic derailments. The frequency of vomiting should be < 3/die. The following are the agents/drugs used for treatment:

  • Vitamin B6 (pyridoxine).
  • Antihistamines (medications that attenuate or reverse the effects of the endogenous neurotransmitter histamine by blocking histamine receptors) – such as dimenhydrinate, diphenhydramine, doxylamine, or meclozine
  • Antiemetics (medications designed to suppress nausea and vomiting) – such as:

If vomiting is refractory to therapy, a trial of diazepam or hydrocortisone may be attempted.

Further notes

  • Odansetron use in the first trimester (third trimester of pregnancy) was associated with a slightly increased risk of cleft lip and palate (LKGS clefts). Cardiac malformations (malformations of the heart) and general malformation risk were not increased.

Phytotherapeutics

  • Ginger preparations

See also under “Further therapy“.