Related Experiment Video
Updated: Jun 6, 2026

Ear Plaster Therapy as a Safe and Effective Treatment for Gestational Vomiting
Published on: August 4, 2023
WITHDRAWN: Antihistamines versus aspirin for itching in late pregnancy
1Temple Sowerby Medical Practice, Linden Park, Temple Sowerby, Penrith, Cumbria, UK, CA10 1RW.
Background:
While not common, itching in pregnancy (not due to liver disease) can be distressing.
Objectives:
The objective of this review was to assess the effects of treatment for itching in late pregnancy.
Search Strategy:
We searched the Cochrane Pregnancy and Childbirth Group trials register (January 2007).
Selection Criteria:
Randomised trials of treatments for itching in women in late pregnancy with normal liver function.
Data Collection And Analysis:
Two review authors independently assessed trial quality and extracted data.
Main Results:
One study of 38 women was included. This was a small crossover trial, using alternate allocation. The trial compared a histamine, chlorpheniramine, with aspirin. Aspirin was more effective than chlorpheniramine in relieving itching (odds ratio 2.39, 95% confidence interval 1.25 to 4.57). However, chlorpheniramine was more effective than aspirin when a rash was present.
Authors' Conclusions:
Aspirin appears to be more effective than chlorpheniramine for relief of itching in pregnancy when no rash is present. If there is a rash, chlorpheniramine may be more effective.
Related Concept Videos
Upper Respiratory Drugs: First and Second-Generation Antihistamines
Histamine binds to specific receptor sites, known as H1 receptors, on tissue cells, triggering inflammation and swelling. Antihistamines combat these effects by competing with histamine for these receptor sites. By...
Upper Respiratory Drugs: Antitussives, Expectorants, and Mucolytics
Antitussives include codeine, dextromethorphan (Robitussin), and benzonatate (Tessalon). Codeine and dextromethorphan exert their effects centrally by suppressing the cough reflex center in the medulla. Benzonatate operates peripherally within the respiratory tract by anesthetizing...
Cholinergic Antagonists: Therapeutic Uses
Respiratory Tract: Ipratropium, aclidinium, and tiotropium treat asthma, chronic bronchitis, and chronic obstructive pulmonary disease (COPD). They protect against bronchoconstriction caused by irritants like cigarette smoke, sulfur dioxide, and ozone. They also help reduce nasopharyngeal secretions in common...
Allergic Reactions: Anaphylaxis
Antiasthma Drugs: Mast Cell Stabilizers and Anti-IgE Drugs
Mast cell stabilizers, such as cromolyn (also known as sodium cromoglycate) and nedocromil (Tilade), are effective drugs in asthma management. These stabilizers hinder histamine release by skillfully obstructing the activation of mast cells and other cellular entities. Notably, they navigate this task without...
Cholinergic Antagonists: Pharmacokinetics

