I wouldn't imagine that the Vitex would interact badly with the Inositol, as they're both meant to do different things. If anything, the Inositol may help enhance the effects of the Vitex.
If you're trying to decide between one form or another, I would try to take the Inositol in a powdered form (either loose or in a capsule form, which I'd think is easier) because it will probably be absorbed more easily by your body. Also, you may want to consider taking it along with Choline, it's been a good pairing for me so far.

__________________
Me & DH
Married 1/07
TTC Since 9/2007
BFP: 8/30/09
1st u/s 9/30/09 - Heart-rate 178bpm
2nd u/s 11/03/09 - Heart-rate 144bmp ... possibly team BLUE!
Currently taking:
Pre-Natal Vitamins
Metformin ER - 500mg 2x's a day
Labetalol - 100mg 2x's a day
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