I have never heard of hypertension caused by prolactin, and am surprised
that her hypertension would respond to bromocriptine. But there you are.

There are any number of antihypertensives which could be used.  If a beta
blocker did not work (labetelol), other beta blockers are not likely to
work, I believe.  Methyldopa probably should not be tried if it is true her
hypertension is due to prolactin (though why would it be?), as methyldopa
increases prolactin secretion. Nifedipine is a good calcium channel blocker
and used for hypertension and is very good for breastfeeding mothers. Ace
inhibiters such as captopril can also be used.  Of course, labetelol, alone,
may not be effective, but combined with another drug might work well.

Jack Newman, MD, FRCPC