
Fetus: The unborn offspring from the end of the 8th week after conception (when the major structures have formed) until birth. Up until the eighth week, the developing offspring is called an embryo.

If your body will tolerate other choices, most doctors will recommend chlorpheniramine and tripelennamine as drugs more suitable during pregnancy and breastfeeding. If you can take these medications for just the first trimester, your doctor will usually be more comfortable with you going back on Claritin to keep your symptoms under control. If you cannot tolerate other drugs, you and your doctor will have to weigh the risks and benefits of continuing the medication. In short, Claritin is safe during pregnancy though other drugs are preferred first choices. Though Claritin is best taken after the first trimester, no birth defects are associated with the drug.

Learn about the side effects that are possible when you take Claritin. They include a dry mouth and nose, headache, fatigue and hoarseness. Speak to your doctor if any of these side effects become severe.

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