Idoxuridine, with the CAS number 54 - 42 - 2, is a well - known antiviral drug. It is also known by other names such as IDU. Chemically, it is 5 - iodo - 2'-deoxyuridine.
The molecular formula of idoxuridine is C9H11IN2O5, and its molecular weight is approximately 354.1 g/mol. It appears as a white to off - white crystalline powder. Idoxuridine has a melting point in the range of 176 - 178°C. It is sparingly soluble in water, slightly soluble in ethanol, and soluble in alkaline solutions.
Idoxuridine is mainly used in the medical field, especially in ophthalmology. It is an effective antiviral agent against herpes simplex virus (HSV) types 1 and 2. In ophthalmic applications, it is used to treat herpes simplex keratitis, which is a common and potentially serious eye infection caused by the herpes simplex virus.
Beyond ophthalmology, idoxuridine also has some research - related uses. It can be used in cell culture experiments to study the replication and inhibition of herpes viruses. Scientists use it to understand the mechanisms of viral infections at the cellular level and to develop new antiviral strategies.
For ophthalmic use, idoxuridine is typically formulated as an eye ointment or eye drops. When using eye drops, the patient should first wash their hands thoroughly. Tilt the head back, pull down the lower eyelid to form a small pocket, and instill the recommended number of drops into the pocket. Then, gently close the eyes for a few minutes to allow the drug to spread evenly over the eye surface.
When using the eye ointment, after hand - washing, the patient should also tilt the head back. A small amount of the ointment is squeezed onto the lower eyelid, and then the eyes are gently closed. The ointment may cause some temporary blurring of vision, but this usually resolves quickly.
The dosage and frequency of use depend on the severity of the infection. Usually, eye drops are used every 1 - 2 hours during the day and every 2 - 3 hours at night until the condition improves. The treatment course may last for several days to weeks, and it should be strictly followed as prescribed by a doctor.
Case 1: A 35 - year - old male patient presented with redness, pain, and blurred vision in his right eye. After examination, he was diagnosed with herpes simplex keratitis. The doctor prescribed idoxuridine eye drops, to be used every 2 hours during the day and every 3 hours at night. After 3 days of treatment, the patient reported a significant reduction in pain and redness. After 10 days of continuous treatment, the keratitis was completely cured, and the patient's vision returned to normal.
Case 2: A 42 - year - old female patient had a history of recurrent herpes simplex virus infections in her eyes. This time, when she had a new outbreak, she was prescribed idoxuridine eye ointment in addition to eye drops. The combination therapy was used more frequently in the first few days. After 2 weeks of treatment, the infection was effectively controlled, and the recurrence frequency decreased significantly in the following months.
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