Common questions about Duratears (FAQ)
Q: What is the difference between Duratears and other eye drops?
A: The official product description indicates that this solution is a combination product utilizing two specific polymers, Dextran 70 and Hypromellose. This dual composition is described in regulatory documents as contributing to the physical stabilization of the tear film and providing lubrication, which differentiates it from eye drops that rely on a single polymer.
Q: Can Duratears be used to treat red eyes?
A: The product is officially indicated for the temporary relief of discomfort and irritation specifically caused by dry eye conditions. Regulatory documents list redness of the eye (hyperaemia) as a possible adverse reaction, not a condition that the medicine is intended to treat.
Q: How quickly does Duratears start working?
A: As an ocular lubricant, the product works by forming a protective film directly on the eye’s surface. Because this is a physical barrier mechanism, the physical effects, such as lubrication, are noted to occur immediately upon application.
Q: How long does the lubrication from Duratears last?
A: Official directions state the product is intended for temporary relief and should be used 'as needed.' This means the duration of the lubrication can vary significantly based on factors like the severity of the user's dry eye condition and the surrounding environment.
Q: Why does Duratears sometimes feel like an ointment instead of a drop?
A: The solution contains the polymer Hypromellose, which is specifically added to increase the product's viscosity, or thickness. This added thickness is intended to contribute to prolonged contact time on the eye, resulting in a feel that may be notably heavier than typical, non-viscous eye drops.
Q: Can I use Duratears every day?
A: This product is classified as a non-prescription lubricant intended for temporary relief and is used as needed. Official documentation advises that long-term effects for this type of over-the-counter product are not fully established in available regulatory data. If symptoms worsen or persist for more than 72 hours, official labeling suggests discontinuing use and seeking consultation.
Q: Why might a doctor prescribe Duratears instead of a standard artificial tear product?
A: Official documents describe this formulation as a dual-polymer combination of Dextran 70 and Hypromellose. This specific pairing is described in regulatory documents as contributing to the physical stabilization of the tear film, which can be a key point of differentiation for this ocular lubricant.
Q: Do I need to shake the Duratears container before use?
A: Official administration instructions for the Dextran 70 and Hypromellose solution do not specify a requirement to shake the container prior to use.
Q: What is the purpose of the liquid paraffin in Duratears?
A: The ointment formulation contains liquid paraffin and white petrolatum. These ingredients contribute to forming an occlusive lipid layer on the eye's surface, which is intended to slow down the rate of tear evaporation.
Q: Can Duratears be used for eyes that water too much?
A: The product's official indication is limited to the temporary relief of minor ocular irritation and discomfort that results from dry eye conditions.
Q: What is the role of mineral oil in the Duratears formulation?
A: In the ointment formulation, mineral oil and other emollients contribute to creating a physical barrier layer on the eye surface. This layer functions as a lubricant to reduce friction and is described as helping to protect against irritation.
Q: Do people with sensitive eyes typically tolerate Duratears?
A: Official documentation indicates that known hypersensitivity (allergy) to any component is a regulatory contraindication. Adverse reactions listed in regulatory data include local effects such as ocular irritation, pain, or redness, which are possibilities noted in the official safety profile.
Q: Are there any specific warnings for people with glaucoma using Duratears?
A: Official regulatory labeling does not contain any specific warnings, contraindications, or precautions that relate to the use of this product by individuals with glaucoma.
Q: Does Duratears contain any preservatives?
A: The inclusion of preservatives depends on the specific packaging of the product. Some multi-dose bottles may contain a preservative, while the single-use unit doses are typically formulated to be preservative-free, according to official inactive ingredient lists.
Q: What is the difference between Duratears Ointment and Duratears Drops?
A: The two forms have different compositions: Duratears Ointment is an oil-based product using ingredients like mineral oil and petrolatum. Duratears Drops (Solution) is an aqueous, or water-based, product that uses the polymers Dextran 70 and Hypromellose.
Q: Is there a maximum number of times per day Duratears can be used?
A: Regulatory instructions direct users to instill the drops 'as needed' for temporary relief. There is no stated maximum frequency per day. However, official safety warnings advise that if eye pain or irritation worsens or persists for more than 72 hours, the official direction is to discontinue use and seek consultation.
Q: Can Duratears be purchased over-the-counter in other countries?
A: Yes, official regulatory bodies in many major international regions consistently classify this product type (Dextran 70/Hypromellose ophthalmic lubricant) as a non-prescription, Human Over-the-Counter drug.
Q: What should I do if Duratears looks cloudy or changes color?
A: The official warning on regulatory labeling advises users not to use the product if the solution changes color or becomes cloudy in appearance. In this circumstance, official requirements state the product must be discarded.
Q: Does Duratears contain electrolytes?
A: Official regulatory documentation listing the inactive ingredients indicates that the formulation includes electrolytes, such as potassium chloride and sodium borate.
Q: Is Duratears oil-based or water-based?
A: The classification depends on the specific product form. The Dextran 70 and Hypromellose drops are classified as an aqueous (water-based) solution, while the ointment version is an oil-based formulation.
Q: What evidence exists about Duratears helping with symptoms from computer use?
A: The official regulatory description of the product's uses notes that it is intended to relieve dry, irritated eyes from common causes. These causes are cited to include extended computer use and reading.
