Don't be told anything...just go to a the Drug Information Portal and look it up.
If you listened to Big Bapper you will never cry about weak growth hormone. If you follow what some other guy told you you may end up with some GH that fades in the stretch.
Before Reconstitution--Nutropin and Bacteriostatic Water for Injection, USP (benzyl alcohol preserved), must be stored at 2-8°C/36-46°F (under refrigeration). Avoid freezing the vials of Nutropin and Bacteriostatic Water for Injection, USP (benzyl alcohol preserved). Expiration dates are stated on the labels.
After Reconstitution--Vial contents are stable for 14 days when reconstituted with Bacteriostatic Water for Injection, USP (benzyl alcohol preserved), and stored at 2-8°C/36-46°F (under refrigeration). Avoid freezing the reconstituted vial of Nutropin and the Bacteriostatic Water for Injection, USP (benzyl alcohol preserved).
Hygetropin's site says just a few days with BAC water and Jintropin's says closer to a month. So it could be it varies from brand to brand. But BAC water will always be longer than sterile water.