I can’t confirm “Jordin D syrup” from reliable medicine listings, so please check the spelling or share a photo of the bottle/its composition.

If it contains an antihistamine such as cetirizine, levocetirizine, chlorpheniramine, or fexofenadine, it may be prescribed for allergy symptoms like sneezing, runny nose, itching, or hives. But the name alone is not enough to say it is appropriate.

Do not give it, especially to a child, without checking the active ingredients and prescribed dose. Seek urgent care for breathing difficulty, lip/tongue swelling, fainting, or rapidly spreading hives.

Yes. Desloratadine is an antihistamine used for allergic problems, including:

It is a newer, usually less-sedating antihistamine, though some people may still feel sleepy. Use the dose written by the doctor or on the prescription, since syrup doses vary by the child’s age and the liquid strength. It does not treat severe allergic reactions with breathing difficulty or facial/tongue swelling. For those, seek urgent medical care. The DailyMed prescribing information lists these allergy and hives uses.

Calamine lotion is a topical soothing and drying lotion used for mild itchy skin conditions, such as:

How to use: Shake well, apply a thin layer to intact skin, and let it dry. Usually it can be used up to 3-4 times a day, depending on the label. It is for external use only. The DailyMed label advises asking a doctor before use in children under 2 years.

Avoid applying it to eyes, mouth, genitals, deep wounds, infected skin, or large areas of broken skin. See a clinician if the rash is painful, has pus/fever, spreads quickly, or does not improve within about a week.