Praziquantel flakes for fish, any1 tried?

[nanomania]

I came across these prazi flakea on ebay, any1 tried? Are they safe? Overdose issue?

http://m.ebay.com/itm/Anti-Parasite...l-Water-Types-Flakes-/222168412937?nav=SEARCH

 

[Humblefish]

The problem with prazi soaked food is IME praziquantel is better at treating external worms (ex. gill flukes) than internal parasites/intestinal worms. Sometimes the latter can be eradicated using prazi; other times you have to resort to metronidazole.