ZYNTHIX- undecylenic acid solution solution

Drug Labeling and Warnings

Drug Details [pdf]

Active ingredient

Undecylenic Acid 25%

Purpose

Antifungal

Uses

• For the treatment of most athlete’s foot, jock itch, and ringworm.
• Relieves itching, burning, cracking, and scaling.

Warnings

• For external use only.
• This product is not effective on the scalp.
• Flammable. Keep away from fire or flame.

Do not use

• On children under 2 years of age unless directed by a doctor.
• For diaper rash.

When using this product

• Avoid contact with eyes.
• May cause mild stinging or burning sensation on broken skin.

Stop use and ask a doctor if

• Irritation occurs or gets worse.
• There is no improvement within 4 weeks (for athlete's foot and ringworm) or 2 weeks (for jock itch).

Pregnancy or breast feeding section

If pregnant or breast-feeding, ask a health professional before use.

Keep out of reach of children

If swallowed, get medical help or contact a Poison Control Center right away.

Directions

• Clean the affected area and dry thoroughly.
• Twist off the cap, rotate the bottom to dispense solution to the brush.
• Apply a thin layer to the affected area twice daily (morning and night) or as directed by a doctor.
• For athlete's foot: pay special attention to spaces between the toes; wear well-fitting, ventilated shoes, and change shoes and socks at least once daily.
• For athlete's foot and ringworm, use daily for 4 weeks.
• For jock itch, use daily for 2 weeks.
• Supervise children in the use of this product.

Other information

• Store at room temperature 15°-30°C (59°-86°F).
• Protect from excessive heat and direct sunlight.

Inactive ingredients

Alcohol denat, Borneol, Glycerin, Isopropyl alcohol, Menthol, Water.

Questions?

213-396-1046 / MalachiPerez291@gmail.com

Box Front Panel

ZYNTHIX
ANTIFUNGAL PEN

25% Undecylenic Acid
Maximum Strength

• Helps Treat Fungal Infections
• Relieves Itching & Burning
• Supports Healthy Nails

NET:12ml/0.42fl.oz
(3x4mL)

INGREDIENTS AND APPEARANCE

ZYNTHIX 
undecylenic acid solution solution

Product Information
Product Type	HUMAN OTC DRUG	Item Code (Source)	NDC: 87575-4041
Route of Administration	TOPICAL

Active Ingredient/Active Moiety
Ingredient Name	Basis of Strength	Strength
UNDECYLENIC ACID (UNII: K3D86KJ24N) (UNDECYLENIC ACID - UNII:K3D86KJ24N)	UNDECYLENIC ACID	1 g  in 4 mL

Inactive Ingredients
Ingredient Name	Strength
MENTHOL (UNII: L7T10EIP3A)	0.08 g  in 4 mL
BORNEOL (UNII: M89NIB437X)	0.004 g  in 4 mL
ALCOHOL (UNII: 3K9958V90M)	0.2 g  in 4 mL
ISOPROPYL ALCOHOL (UNII: ND2M416302)	1 g  in 4 mL
GLYCERIN (UNII: PDC6A3C0OX)	0.04 g  in 4 mL
WATER (UNII: 059QF0KO0R)	1.676 g  in 4 mL

Product Characteristics
Color	white (Transparent)	Score
Shape		Size
Flavor		Imprint Code
Contains

Packaging
#	Item Code	Package Description	Marketing Start Date	Marketing End Date
1	NDC: 87575-4041-1	3 in 1 BOX	04/08/2026
1		4 mL in 1 APPLICATOR; Type 2: Prefilled Drug Delivery Device/System (syringe, patch, etc.)

Marketing Information
Marketing Category	Application Number or Monograph Citation	Marketing Start Date	Marketing End Date
OTC Monograph Drug	M005	04/08/2026

Labeler - Shenzhen Siwei Yijiu Trading Co., Ltd. (513968837)

Registrant - Shenzhen Siwei Yijiu Trading Co., Ltd. (513968837)

Establishment
Name	Address	ID/FEI	Business Operations
Nanjing Ningjitong Pharmaceutical Biotechnology Co., Ltd		450168555	manufacture(87575-4041)