Cetirizine Hydrochloride Drops not coming out may be related to improper use and insufficient dosage, which can be handled by shaking and increasing the opening. Cetirizine Hydrochloride Drops belongs to the group of antihistamines and can be used to treat respiratory tract, skin and other allergic symptoms. However, it should not be used in newborns, those who are allergic to the drug components, or those with severe renal insufficiency. Adverse reactions such as headache, drowsiness and fatigue may also occur. When using Cetirizine Hydrochloride Drops, you need to open the cap of the bottle so that the mouth of the bottle is vertically downward, and the liquid inside the medicine will automatically drip out. If the opening is too small resulting in no drops coming out, you can cut the opening part slightly larger, or you can shake the bottle and let the liquid flow out. If the amount of medicine is not enough to cause the drops to not come out, you need to buy it again. To summarize, patients are advised to use the medication in strict compliance with the doctor’s instructions and consult the doctor if necessary.