October 5, 2015


(methyltestosterone) Capsule, Gelatin Coated


The androgens are steroids that develop and maintain primary and secondary male sex characteristics.

Androgens are derivatives of cyclopentanoperhydrophenanthrene. Endogenous androgens are C-19 steroids with a side chain at C-17, and with two angular methyl groups. Testosterone is the primary endogenous androgen. In their active form, all drugs in the class have a 17-beta hydroxy group. 17-alpha alkylation (Methyltestosterone) increases the pharmacologic activity per unit weight compared to testosterone when given orally.

Methyltestosterone, a synthetic derivative of testosterone, is an androgenic preparation given by the oral route in a capsule form. Each capsule contains 10 mg of Methyltestosterone USP. It has the following structural formula:

testred (Methyltestosterone)  Structural Formula Illustration

C20H30O2     M.W. 302.46


Methyltestosterone occurs as white or creamy white crystals or powder, which is soluble in various organic solvents but is practically insoluble in water.

Each capsule, for oral administration, contains 10 mg of Methyltestosterone. In addition, each capsule contains the following inactive ingredients: Corn starch NF, Gelatin NF, FD&C Blue #1, FD&C Red #40.

What are the possible side effects of methyltestosterone (Android, Methitest, Testred)?

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.

Call your doctor at once if you have any of these serious side effects:

  • feeling short of breath, even with mild exertion;
  • swelling, rapid weight gain;
  • increased or ongoing erection of the penis;
  • bone pain, increased thirst, memory problems, restless feeling, confusion, nausea, loss of appetite, increased urination, weakness, muscle twitching;...

Read All Potential Side Effects and See Pictures of Testred »

What are the precautions when taking methyltestosterone (Testred)?

Before using methyltestosterone, tell your doctor or pharmacist if you are allergic to it; or if you have any other allergies. This product may contain inactive ingredients, which can cause allergic reactions or other problems. Talk to your pharmacist for more details.

Before using this medication, tell your doctor or pharmacist your medical history, especially of: cancer (such as breast cancer in men, prostate cancer), blood clots (such as in the leg, lungs), heart disease (such as heart failure, chest pain, heart attack), stroke, liver problems, kidney problems, certain mineral imbalance (high calcium blood level), high cholesterol, high blood pressure, enlarged prostate, breathing problems (such as sleep apnea, chronic obstructive pulmonary disease-COPD), diabetes.


Read All Potential Precautions of Testred »

Last reviewed on RxList: 11/13/2008
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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