Dr. Charles Mok explains why testosterone replacement therapy doesn't increase blood clot risk, despite concerns borrowed from estrogen-based birth control. Large studies of tens of thousands of men show no elevated clotting risk.
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Two other things that sometimes doctors cite because their lack of awareness and not prescribing testosterone. One of them is the possibility of getting a blood clot. So there's a theory that testosterone might cause blood clots because high dose birth control pills cause blood clots in women that are over 35 and smoking. So there's a unique subset of hormone replacement therapy, which would be in the birth control pill, that has clotting effects in women. So doctors maybe have translated this in the men. So large studies done with tens of thousands of men looking at the rate of blood clotting, and then with testosterone, women without testosterone, well, it's not protective. It does not increase your risk. So it's not an increased risk of blood clot, at least not scientifically on testosterone placement. In most clinical studies.