Treatment of Giardiasis During the First Trimester of Pregnancy

This protocol addresses confirmed Giardiasis presenting in a patient who is pregnant and in the first trimester. The concurrent pregnancy creates specific constraints on antiparasitic selection that require a tailored therapeutic approach distinct from the standard adult regimen.

Active pregnancy in the first trimester is the defining clinical factor here. When treatment of Giardiasis is required during this period, the choice of antiparasitic agent must account for fetal safety. Not all standard antiparasitic options are appropriate in the first trimester.

If treatment can be safely deferred, that option should be evaluated; however, when intervention is necessary, agent selection follows trimester-specific guidance.

When treatment is required in the first trimester, a specific antiparasitic agent is recommended as the preferred option. A commonly used antiparasitic for Giardiasis in non-pregnant adults is not recommended during the first trimester.

The complete regimen — including agent selection, dosing, duration, and paediatric adjustments — is available in the full structured protocol below.