How long does an opened wormer keep?

[Spyda]

I find it really irritating that the majority of syringe wormers aren't sufficient for a 625kg horse It's a real pain and extra expense to have to buy two every time I worm. Grrrrrr

Anyway, if I buy an extra syringe it would be sufficient to top up three wormings - but would an unsealed syringe last months?

 

[NOISYGIRL]

I find it really irritating that the majority of syringe wormers aren't sufficient for a 625kg horse It's a real pain and extra expense to have to buy two every time I worm. Grrrrrr

Anyway, if I buy an extra syringe it would be sufficient to top up three wormings - but would an unsealed syringe last months?

Give the manufacturer a ring, I would have thought it would be ok if you kept it in the fridge or somewhere cool

 

[ThePony]

if they don't last perhaps you could use the pastille things they have started selling, or wormer granuales? I would have thought if stored in an air tight containter that they would keep well.
http://www.wormers-direct.co.uk/equimaxtabs.html
http://shop.wormers-direct.co.uk/eraquell-tablets-1-x-8-p-96.html
http://shop.wormers-direct.co.uk/panacur-equine-granules-p-11.html
http://shop.wormers-direct.co.uk/strongid-p-granules-p-14.html
http://shop.wormers-direct.co.uk/telmin-granules-2x20gms-p-15.html
http://shop.wormers-direct.co.uk/vectin-tablets-1-x-7-tabs-p-88.html

Some wormers have enough in for heavier horses:
http://www.wormers-direct.co.uk/dataEquimax.html
http://www.wormers-direct.co.uk/dataEraquell.html
http://www.wormers-direct.co.uk/dataNoromectin.html
http://www.wormers-direct.co.uk/dataTelminPaste.html

 

[thatsmygirl]

The vets have always told me they are fine once opened until their date on the back along as stored right. I save my bits and the ponies have all the left overs as they normally come with long dates