May 22, 2017
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"The US Food and Drug Administration (FDA) has approved class-wide labeling changes for all prescription testosterone products, the agency announced today.

New safety information from published literature and case reports on the risks "...



(testosterone) Transdermal System


ANDRODERM (testosterone transdermal system) is designed to deliver testosterone continuously for 24 hours following application to intact, non-scrotal skin (e.g., back, abdomen, thighs, upper arms).

Two strengths of ANDRODERM are available that deliver approximately 2 mg or 4 mg of testosterone per day.

ANDRODERM has a central drug delivery reservoir surrounded by a peripheral adhesive area. The ANDRODERM 2 mg/day system has a total contact surface area of 32 cm² with a 6.0 cm² central drug delivery reservoir containing 9.7 mg testosterone USP, dissolved in an alcohol-based gel. The ANDRODERM 4 mg/day system has a total contact surface area of 39 cm² with a 12.0 cm² central drug delivery reservoir containing 19.5 mg testosterone USP, dissolved in an alcohol-based gel. Testosterone USP is a white, or creamy white crystalline powder or crystals chemically described as 17-hydroxyandrost-4-en-3-one.

ANDRODERM® (testosterone transdermal system) Structural Formula Illustration

The ANDRODERM systems have six components as shown in Figure 1. Proceeding from the top toward the surface attached to the skin, the system is composed of (1) metallized polyester/Surlyn® (ethylene-methacrylic acid copolymer)/ethylene vinyl acetate backing film with alcohol resistant ink, (2) a drug reservoir of testosterone USP, alcohol USP, glycerin USP, glycerol monooleate, methyl laurate, sodium hydroxide NF, to adjust pH, and purified water USP, gelled with carbomer copolymer Type B NF, (3) a permeable polyethylene microporous membrane, and (4) a peripheral layer of acrylic adhesive surrounding the central, active drug delivery area of the system. Prior to opening of the system and application to the skin, the central delivery surface of the system is sealed with a peelable laminate disc (5) composed of a five-layer laminate containing polyester/polyesterurethane adhesive/aluminum foil/polyester-urethane adhesive/polyethylene. The disc is attached to and removed with the release liner (6), a silicone-coated polyester film, which is removed before the system can be used.

Figure 1: System Schematic

System Schematic - Illustration

The active ingredient in the system is testosterone. The remaining components of the system are pharmacologically inactive.

What are the possible side effects of testosterone topical?

Get emergency medical help if you have any of these signs of an allergic reaction: hives; difficulty breathing; swelling of your face, lips, tongue, or throat.

Stop using testosterone topical and call your doctor at once if you have any of these serious side effects:

  • burn-like blistering of the skin where the transdermal patch is worn;
  • skin irritation with patch-wearing that does not get better with time;
  • problems with urination;
  • swelling of your ankles;
  • frequent, prolonged, or bothersome erections; or
  • nausea, stomach pain, low...

Read All Potential Side Effects and See Pictures of Androderm »

Last reviewed on RxList: 11/7/2016
This monograph has been modified to include the generic and brand name in many instances.

Report Problems to the Food and Drug Administration


You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.

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