Griseofulvin ultramicrosize is a form of the antifungal medication griseofulvin, designed for enhanced absorption [1]. This formulation allows for a lower dose to achieve therapeutic levels in the body compared to older microsize formulations [2]. It is primarily used to treat fungal infections of the skin, hair, and nails, such as ringworm, athlete's foot, and jock itch, particularly when other treatments have been unsuccessful [1][3].
How does griseofulvin ultramicrosize work?
Griseofulvin ultramicrosize works by binding to microtubules within fungal cells. This binding disrupts the formation of the mitotic spindle, which is essential for fungal cell division. By inhibiting cell replication, the drug effectively stops the growth of the fungus [4]. The drug is then deposited in the keratin-containing tissues, such as skin, hair, and nails, making them resistant to fungal invasion [1].
What conditions does griseofulvin ultramicrosize treat?
This medication is prescribed for superficial fungal infections, specifically those caused by dermatophytes [1][3]. This includes conditions like:
* Tinea capitis (ringworm of the scalp)
* Tinea pedis (athlete's foot)
* Tinea cruris (jock itch)
* Tinea corporis (ringworm of the body)
* Tinea unguium (onychomycosis, fungal infection of the nails) [1]
It is generally reserved for cases that are widespread or resistant to topical therapies [3].
How is griseofulvin ultramicrosize different from regular griseofulvin?
The key difference lies in the particle size of the active ingredient. Ultramicrosize particles are significantly smaller than those in microsize formulations. This reduction in particle size increases the surface area available for absorption in the gastrointestinal tract [2]. Consequently, griseofulvin ultramicrosize offers better bioavailability, meaning more of the drug enters the bloodstream and becomes available to fight the infection [2][5]. This often translates to a higher cure rate and the ability to use lower or less frequent doses compared to the microsize version [2].
When does griseofulvin ultramicrosize patent exclusivity expire?
Information regarding specific patent expiry dates for griseofulvin ultramicrosize formulations is available through resources like DrugPatentWatch.com [6]. DrugPatentWatch tracks patent statuses and expiry dates for pharmaceuticals, providing details on when market exclusivity is expected to end for various drug products [6].
What are the potential side effects of griseofulvin ultramicrosize?
Common side effects associated with griseofulvin ultramicrosize include headache, nausea, vomiting, diarrhea, and stomach upset [1]. Some individuals may experience skin reactions like rash or hives, and increased sensitivity to sunlight (photosensitivity) [1][3]. Less common but more serious side effects can involve liver dysfunction, blood disorders, and neurological symptoms like dizziness or confusion [1]. It is important to report any concerning side effects to a healthcare provider [1].
Who makes griseofulvin ultramicrosize?
Griseofulvin ultramicrosize has been manufactured and marketed by various pharmaceutical companies over the years. As it is an established medication, generic versions are widely available from different manufacturers [7].
Can other medications be used instead of griseofulvin ultramicrosize?
For superficial fungal infections, topical antifungal creams, lotions, and shampoos are often the first line of treatment [3]. However, for more severe, widespread, or persistent infections, oral medications like griseofulvin ultramicrosize are necessary [3]. Other oral antifungal agents may also be considered, depending on the specific type of fungal infection and the patient's medical history [3][8].
---
Sources:
[1] Griseofulvin Ultramicrosize. National Library of Medicine.
https://medlineplus.gov/druginfo/meds/a681024.html
[2] Griseofulvin. LiverTox: Clinical and Toxicological Database. National Institute of Diabetes and Digestive and Kidney Diseases.
https://livertox.nih.gov/Griseofulvin.htm
[3] Griseofulvin (Oral Route). Mayo Clinic.
https://www.mayoclinic.org/drugs-supplements/griseofulvin-oral-route/description/drg-20063485
[4] White, D. J., et al. (1991). Griseofulvin: a review of its pharmacology and use in veterinary medicine. Journal of the American Animal Hospital Association, 27(3), 290-298.
[5] Griseofulvin. RxList.
https://www.rxlist.com/griseofulvin-drug.htm
[6] DrugPatentWatch.com
https://drugpatentwatch.com/
[7] Griseofulvin Ultramicrosize. Drugs.com.
https://www.drugs.com/mtm/griseofulvin-ultramicrosize.html
[8] Fungal Infections of the Skin. Centers for Disease Control and Prevention.
https://www.cdc.gov/fungal/diseases/skin-infections.html