ruthan666: Hello,
because of stupid design - replenish potions only through meditation (i didnt know that), i drop some potions, because i need to replenish them through new creation through Alchemy menu - and them you have 0/x potion in inventory, you cant create new ones .
I think that at least, there should be fixed info message in alchemy menu, if potion count is 0/X - there should be not only - already owned message but.. already owned, replenish through meditation.

So i drop strong Griffin Decoction potion and i not able to replenish it, is in game any way how to regain this potion?
Some trailer, cheat, console command, more that one griffin mutagen from boss, etc?

AiCola: there is at least one griffing in velen (but high level)
I don't know what he drops though.

ruthan666: Hello,
because of stupid design - replenish potions only through meditation (i didnt know that), i drop some potions, because i need to replenish them through new creation through Alchemy menu - and them you have 0/x potion in inventory, you cant create new ones .
I think that at least, there should be fixed info message in alchemy menu, if potion count is 0/X - there should be not only - already owned message but.. already owned, replenish through meditation.

So i drop strong Griffin Decoction potion and i not able to replenish it, is in game any way how to regain this potion?
Some trailer, cheat, console command, more that one griffin mutagen from boss, etc?

Catrhis: You can try to enable the console and give yourself back the mutagen

Here the mod:
http://www.nexusmods.com/witcher3/mods/28/?

And here a site that hold nearly everything that can be done by the debug commands:
http://www.mmo-game.eu/witcher-3-debug-console-commands/

There are also link for the various pages with the items name, in your case this one:
http://www.mmo-game.eu/witcher-3-miscellaneous-items/

And the mutagen name of the Gryphon is: Gryphon mutagen

I remember to also have found another gryphon later in the game, as i am pretty sure i had found another gryphon mutagen and sold it, but i don't remember where

light487: Awesome.. now I can get that pesky gwent card that you only get from the White Orchard inn keeper but becomes unavailable after the prologue.. If it wasn't for hard-lockouts like that, I would never consider cheating in a game like this but with design decisions like that.. I can't help but feel cheated out of game content without any warning.

hollywoodb1: There's a lot of whining here isn't there? If you miss out on something like a card, you miss out. Try to nab it the next time around. If you can't read when you're prompted with tutorial information because you're lazy or don't have time, there's not a lot anyone here can do for you. Don't confuse your laziness with "stupid design" when it works and tells you HOW it works when you don't feel like paying attention. If you want this game to guide you, explain every single detail in a way a 2 year old would understand, and hold your hand while you go to the bathroom, you're not going to have a pleasant experience with The Witcher 3. Some of us are grateful for a game that isn't dumbed down like most games coming out now.

Also, I sincerely can't comprehend why you dropped it in the first place. If nothing else, the fact that it didn't vanish should have let you know that maybe, just maybe, it would be used for something else. But no, just stupid design, I'm sure.

hollywoodb1: There's a lot of whining here isn't there? If you miss out on something like a card, you miss out. Try to nab it the next time around. If you can't read when you're prompted with tutorial information because you're lazy or don't have time, there's not a lot anyone here can do for you. Don't confuse your laziness with "stupid design" when it works and tells you HOW it works when you don't feel like paying attention. If you want this game to guide you, explain every single detail in a way a 2 year old would understand, and hold your hand while you go to the bathroom, you're not going to have a pleasant experience with The Witcher 3. Some of us are grateful for a game that isn't dumbed down like most games coming out now.

Also, I sincerely can't comprehend why you dropped it in the first place. If nothing else, the fact that it didn't vanish should have let you know that maybe, just maybe, it would be used for something else. But no, just stupid design, I'm sure.