I do think that Viagra was originally developed for blood-pressure issues, and the erectile side effect was noticed later. Maybe this is also true for Cialis. But I'd ask a doctor, (especially if your husband never had swelling in his feet and legs.)
Ok Thank you for your time.
I know that drugs like Viagra etc,,, are used for pulmonary hypertension as well as erectile dysfunction. I'm a nurse and had a guy come on our floor with sildenafil as a regular medication. I asked the doctor why and he said the pulmonary hypertension. So I could see a use for what your husband said.
Rogelio