There are other drugs that will also improve circulation.
Calcium Channel blockers -- These have research behind them for RSD. (Nifedipine, diltiazem are examples). These dilate blood vessels.
Nitrates will improve circulation. Example Imdur
Some people use low dose Viagra for this too. This drug was initially made for cardiovascular use. The low dose is called Revatio:
http://www.pdrhealth.com/drugs/rx/rx...&contentId=712
Some patients with severe Raynaud's which can accompany Scleroderma use it. (off label) Some insurances will not pay for this off label, however.
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Weezie looking at petunias 8.25.2017
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