Usually testosterone undecanoate pills to take 2 to 3 weeks time is good, but the specific time to take according to the patient’s condition to decide, it is recommended to go to the hospital in a timely manner to clarify the cause of the disease, symptomatic treatment. When the patient’s symptoms are relatively mild, you can take the drug under the guidance of the doctor for 2 to 3 weeks to slowly recover, if the patient’s symptoms are more serious, you need to take more than 3 weeks time as well, the specific time to take the advice of a doctor. Possible adverse reactions include erythrocytosis nausea, vomiting, diarrhea, abdominal pain, itching and so on. It should be noted that testosterone undecanoate is contraindicated for those who are allergic to testosterone undecanoate, pregnant women, male patients with diagnosed or suspected prostate or breast cancer, as well as those who are pubescent, hypertensive, epileptic, or have impaired liver function should use it with caution. Testosterone undecanoate gel pills are prescription drugs, must be prescribed under the guidance of a doctor to get the drug, remember not to use the drug without authorization, if there is any discomfort promptly inform the doctor.