Is Stanozolol still available in US pharmacies to be prescribed for hereditary angioedema?

Yes, with a prescription, in 2 mg tablets, under the name Winstrol. You should be advised that this medication tends to cause a significant rise in cholesterol and should not be taken by anyone who has a history of atheroscl heart disease. An alternative that has a cholesterol-lowering effect (so good, in fact, that it is used in Japan as a treatment for hypercholesterolemia) is Furzabol.