Claritin Children's Formula is used to treat seasonal allergies, hay fever, nasal congestion, and eyes irritated by allergants. MedlinePlus notes that Claritin Children's Formula is an antihistamine, and is available over the counter. The medication is designed to temporarily relieve the symptoms of children's allergies, but should be used with caution as it may cause side effects in some children.
Headaches
One side effect associated with Claritin Children's Formula is headaches. According to Drugs.com, approximately 7 percent of the children taking Claritin Children's Formula have reported headaches. This is considered to be a relatively minor side effect.
Dry Mouth
According to RxList, Claritin Children's Formula is known to alter salivation patterns. Drugs.com reports that this may result in cases of dry mouth. This is not considered to be a severe side effect and may be alleviated with increased water intake while the child is taking Claritin Children's Formula.
Nausea
Nausea is considered to be a minor and rare side effect of Claritin Children's Formula according to Drugs.com. According to RxList, the level of prevalence for this side effect of Claritin Children's Formula is about 2 to 3 percent in patients who between 2 and 5 years of age. In older children, RxList notes that the presence of nausea is negligible.
Diarrhea
RxList reports that Claritin Children's Formula can cause diarrhea at a rate of around 2 to 3 percent for patient populations between 2 and 5. This is mostly considered to be a minor symptom unless it worsens or persists over time, at which time a doctor should be called and children should stop taking the medicine.
