Hi, Ebast-DC is a combination medication that contains ebastine and pseudoephedrine. Ebastine is an antihistamine used to relieve symptoms of allergy, such as sneezing, runny nose, itching, and watery eyes. Pseudoephedrine is a decongestant that helps relieve nasal congestion. While it is generally safe to take Ebast-DC for a short period as directed by a doctor, prolonged use of the medication can lead to several side effects such as dry mouth, dizziness, drowsiness, nausea, and headache. In addition, pseudoephedrine can increase blood pressure and heart rate and may interact with other medications, so it is important to consult a doctor before taking it. If your cold symptoms persist for several months, it is important to consult a doctor to determine the underlying cause and appropriate treatment. Depending on the cause of your cold, your doctor may recommend a different medication or suggest other treatments such as rest, hydration, and steam inhalation. Take care. Hope I have answered your question. Let me know if I can assist you further. Regards, Dr. Priyanka, General & Family Physician