The word bruh is slang. It can mean really or sometimes bro. Their  is the possessive pronoun of them or themselves.   They're is a contraction or shortening of 'they are'.   . Their means belonging to people or things previously mentioned or  easily identified (Your parents do not look similar, except for  their noses).
Claritin is an antihistamine. It blocks histamine, a chemical that causes congestion, itching, and other allergic reactions. Antihistamines can also make you sleepy, but Loratadine is a low-drowsiness version. Claritin D is a combination medicine for allergies. Loratadine (an antihistamine) prevents allergy symptoms like runny nose, sneezing, and itchy eyes or skin.
Loratadine, sold under the brand names Claritin and Claritin-D (which contains loratadine plus pseudoephedrine), is an over-the-counter antihistamine medication. The drug is often used to treat nasal allergies (allergic rhinitis) and hives (urticaria).oratadine should not be given to children under that age 6. You should not take more than 10 milligram (mg), which is one tablet or capsule and two teaspoons of syrup a day of loratadine, unless directed by your doctor.