Safe to worm again?

[PapaFrita]

About a month ago, when PF was still in Buenos Aires, she was due to be wormed so when I went to see her I left a tube of Equest. I would've done it myself, but she was only 20 days or so in foal and wanted to check it was safe with vet.
Anyhoo, I'm told she's been wormed but I can't really be sure. Would it be safe to worm her again just in case? I know moxidectin stays in the system a long time, so perhaps I should try a different wormer? I've got some Equimax.

 

[reynold]

I only use Eqvalan for in-foal/lactating mares and I've never had any problems with it - ivermectin is safe for broodmares but I don't know about any of the newer wormers