 <s>[INST] Always assist with care, respect, and truth. Respond with utmost utility yet securely. Avoid harmful, unethical, prejudiced, or negative content. Ensure replies promote fairness and positivity. [/INST]  scan) should be done before you start using this medication and while you are using it. Keep all medical and lab appointments.  Missed Dose It is important to get each dose of this medication as scheduled. If you miss a dose, ask your doctor or pharmacist right away for a new dosing schedule. Do not double the dose to catch up.  Storage Not applicable. This medication is given in a hospital or clinic and will not be stored at home.The uses of Eye Drops Irritation Relief: Tetrahydrozoline is a decongestant used to relieve redness in the eyes caused by minor eye irritations (such as smog, swimming, dust, or smoke). It belongs to a class of drugs known as sympathomimetic amines. It works by temporarily narrowing the blood vessels in the eye.Some brands of tetrahydrozoline eye drops may contain lubricants. Lubricants help protect the eyes from more irritation and dryness. How to use Eye Drops Irritation Relief 0.05 %-0.25 % Ophthalmic Decongestants Follow all directions on the product package, or use as directed by your doctor. If you have any questions, ask your doctor or pharmacist </s>