Physiological Effects and Management of Supraphysiological Testosterone Use

Hematological and Cardiovascular Effects

Supraphysiological testosterone administration can cause a significant increase in hemoglobin and hematocrit levels, potentially leading to polycythemia and increased blood viscosity, according to the New England Journal of Medicine 1
The use of supraphysiological testosterone may lead to potential adverse cardiovascular events, though evidence is of low certainty, as reported by the Annals of Internal Medicine 2, 3

Supraphysiological doses of testosterone, particularly 600mg/week, can reduce HDL cholesterol levels, as noted in the New England Journal of Medicine 1

A gradual dose reduction, such as 10% per week or 10% per month, rather than abrupt discontinuation, may be beneficial in managing withdrawal symptoms, as suggested by the Mayo Clinic Proceedings 4
Individualized tapering plans based on duration of use and dose, as well as monitoring for and treating withdrawal symptoms throughout the tapering process, are recommended by the Mayo Clinic Proceedings 4
The withdrawal syndrome may persist for months after discontinuation as "protracted withdrawal", according to the Mayo Clinic Proceedings 4

Evaluation of hematocrit and lipid profile to assess normalization is recommended, as noted in the New England Journal of Medicine 1