| Cetirizine, Zyrtec
Cetirizine is a second-generation H1-receptor antagonist antihistamine used for the treatment of allergies, hay fever, angioedema, and hives.
Antihistamine, H2-receptor antagonist
allergic rhinitis, asthma, atopic dermatitis, urticaria,
drowsiness, fatigue, headache, xerostomia (dry mouth)
Magnesium (often found in antacids) may reduce the absorption of H2 antagonists. Take at a different time of day.
Folate absorption is best in an acidic environment. H2 antagonists reduce stomach acid which can lower folate absorption.
Vitamin B12 absorption may be impaired by H2 antagonists, which reduce stomach acid.
Iron and Zinc
Iron and Zinc absorption is inhibited by reduced stomach acid levels.
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