Fungi and yeast can be treated with a variety of products, both topical and oral. Griseofulvin is not included in this list because other drugs are less harsh and also effective.

Lufenuron -- ORAL
Nystatin -- ORAL or TOPICAL
Shampoos -- TOPICAL
Creams -- TOPICAL

Lufenuron (Program)

Recommended dosages vary from 30mg/kg to 45mg/kg to 90 mg/kg. Program seems to have a high range of safety. Must be taken with a fatty meal -- perhaps 1cc of flax seed oil for better absorption.

Nystatin

Oral and topical antifungal agent -- used primarily to treat oral or intestinal Candida infections.

Oral Dosage: no dose is listed for guinea pigs in Carpenter's Formulary.
Dosage varies from 22,000 Units/kg/day to 500,000 IU/kg twice daily, depending on species. The cat dosage is 100,000Units POq6h.

Nystatin can be used to treat an overgrowth of yeast in the intestinal tract. Droppings that are soft and look pitted can be tested for yeast by a vet. It is not absorbed systemically when taken by mouth. It appears to be safe in pregnant animals. If given in high doses may cause anorexia and diarrhea. Since it is not absorbed, it is not toxic when ingested (toxicity would be very rare) though temporary GI stress can result. It is contraindicated in animals that have shown previous hypersensitivity. Store room temp/in dark/avoid moisture.

As a topical treatment, it is used to treat Candidal (Monilial) skin infections. Nystatin is the principal ingredient in Panalog (other active ingredients: neomycin and triamcinolone).

Shampoos

Nizoral -- topical shampoo, active ingredient ketoconazole 2%
The active ingredient in Nizoral is also used as an oral fungal treatment. Nizoral is an over the counter human medicated shampoo that is not currently easy to come by. The alternatives below are prescription medications (call your vet).

KetoChlor -- topical shampoo, active ingredients ketoconazole 1% and chlorhexidine gluconate 2.3%

Malaseb -- active ingredients, Chlorhexidine Gluconate 2% Miconazole Nitrate 2%

Creams

Monistat -- topical cream, active ingredient Miconazole nitrate.
An effective topical treatment for yeast and fungal infections. Apply cream to affected area.