Where can I find an article or personal story that mentions the
smallest dose of nifedipine that could be used by a male on an
irregular, couple of hours before activity, as-needed basis?

Have you heard of any example of a guy using 5mg, like two hours
before activity? If there are guys using smaller doses than 30mg, this
is great because of the lower chance for side-effects.

Also, what do we know about comparison of the ER/XL and CC/SA forms of
nifedipine in the off-label application?