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Photrexa Viscous
Photrexa Viscous (riboflavin ophthalmic solution) is a prescription medication used as part of a treatment regimen for corneal collagen cross-linking in patients with progressive keratoconus or corneal ectasia. The riboflavin solution is applied to the cornea to enhance the strength and stability of the corneal tissue, thereby helping to slow the progression of these conditions.
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Frequently Asked Questions
How quickly does Photrexa Viscous start to work?
The effects of Photrexa Viscous are typically observed during the corneal cross-linking procedure, and the long-term benefits may take several weeks to become apparent as the cornea heals.
Can I stop using Photrexa Viscous suddenly?
It is important to follow the healthcare provider's instructions regarding the use of Photrexa Viscous leading up to the cross-linking procedure. Consult your provider before making any changes to your treatment plan.
Are there any specific dietary restrictions while using Photrexa Viscous?
There are no specific dietary restrictions associated with Photrexa Viscous; however, maintaining a healthy diet contributes to overall eye health.
What should I do if I miss a dose of Photrexa Viscous?
If you miss a dose, take it as soon as you remember. If it’s close to the time for your next scheduled dose, skip the missed dose and continue with your regular schedule. Do not double up on doses.
Is Photrexa Viscous safe for long-term use?
Photrexa Viscous is intended for short-term use as part of the corneal cross-linking procedure. Long-term safety and effectiveness should be discussed with an eye care professional. Regular follow-ups are essential to assess corneal health.
Comprehensive Drug Guide
How Does Photrexa Viscous Work?
Riboflavin, also known as vitamin B2, plays a crucial role in the cross-linking of collagen fibers in the corneal tissue when exposed to ultraviolet (UV) light. When Photrexa Viscous is applied to the cornea and subsequently exposed to UV light, it activates the riboflavin, leading to the formation of covalent bonds between collagen fibers. This process increases the mechanical strength of the cornea and helps to prevent further progression of keratoconus or ectasia.
Common Dosages
- Ophthalmic solution: 0.1% riboflavin in a viscous formulation.
Typical Dosing
- The standard dosing regimen involves applying 1 drop of Photrexa Viscous to the affected eye every 30 minutes for 30 minutes prior to the cross-linking procedure. After the procedure, additional dosing may be provided as per the healthcare provider's instructions.
Typical Dosing
FDA Approved Indications
- Use in corneal collagen cross-linking for the treatment of progressive keratoconus or corneal ectasia.
Who Shouldn't Take Photrexa Viscous?
- Known hypersensitivity to riboflavin or any components of the formulation.
- Pre-existing eye conditions that may contraindicate cross-linking treatment, such as severe corneal scarring or advanced glaucoma.
Advice From The Pharmacist
- Instruct patients on the proper technique for administering the eye drops and emphasize the importance of maintaining sterility by not touching the dropper tip to any surface.
- Advise patients to follow their healthcare provider's instructions regarding the timing and frequency of drops leading up to the cross-linking procedure.
- Discuss potential side effects, such as temporary eye discomfort, and encourage patients to report any persistent or worsening symptoms.
Side Effects of Photrexa Viscous
Common Side Effects
- Eye irritation or discomfort
- Increased sensitivity to light
- Blurred vision
Uncommon/Severe Side Effects
- Severe allergic reactions (such as rash, itching, or swelling)
- Changes in vision or worsening of eye symptoms.
Risks and Warnings of Photrexa Viscous
- Infection Risk: Proper hygiene should be maintained to minimize the risk of infection during the application of the solution and subsequent procedures.
- Monitoring: Regular follow-up with an eye care professional is essential to monitor corneal health and the effectiveness of the treatment.
Interactions with Photrexa Viscous
Common Drug Interactions
- Other Ophthalmic Medications: Patients should inform their healthcare provider of all medications they are using, including other eye drops, to avoid potential interactions and to ensure appropriate timing of administration.
Alternatives to Photrexa Viscous
- Other Treatments for Keratoconus: Alternatives may include intacs (intrastromal corneal ring segments) or corneal transplant for advanced keratoconus, depending on the severity of the condition and individual patient factors.
