Hello Lisa Marie,
I was prescribed Doxycycline for my acne. Twice a day until I finished the prescription. My only advice to you is avoid the sun as much as possible and be weary of yeast infections.
That is probably the biggest side affect that women will suffer from. It's such a strong antibiotic that it literally wipes away all of your good bacteria in the process of clearing the bad bacteria. My pharmacists even suggested I take a probiotic (found at any health food store) at the same time and as often as I take the doxy. But, to my dismay, even that didn't work. I started to get a yeast infection no more than a few days after I started the antibiotic. And eventually, I stopped all together b/c it was to unbearable. So, it's still sitting on my counter top; and in the meantime I'm using topical meds to fight my acne. It's just not worth it to me.
Good luck and keep us posted.