I have been using Tadalafil for 2 months now. I too was afraid of the side effects but went forward and am so happy I did.
I have Pulmonary Hypertension, lung disease from Scleroderma and it has given me my life back. I feel so much better with little use of oxygen around the house and have my energy and spirit back.
I have no side effects that I know of. My Reynauds is under control also.