When do allergy skin test extracts have to be replaced?

Extract Materials -- Expiration Date

Skin Prick Test Materials -- 1 year
ID Test Materials -- 6 months
Anergy Testing Materials -- 6 months

Immunotherapy Treatment Sets

1:10 W/V-1:1000 W/V -- 1 year
1:10,000 W/V and weaker -- 6 months
20,000 PNU/ml-1000 PNU/ml -- 1 year
999 PNU/ml and weaker -- 6 months

Venom Freeze Dried Preparations -- As noted by manufacturer


Pollen-producing plants (weeds and trees). V. Dimov, M.D.

References:

When do allergy skin test extracts need to be replaced? http://buff.ly/VkmYfG
Source: Walter Reed

Related reading:

Summer mailing of timothy grass extract did not reduce potency http://buff.ly/1cDtnOC