[VonLeeuwen]

https://sampwiki.blast.hk/wiki/GetPlayerHealth

Two parameters, you used one:
'GetPlayerHealth(playerid)'

Make it like this:

pawn Код:

if(strcmp("/drunk", cmdtext, true, 9) == 0)
  {
   new pHealth;
   GetPlayerHealth(playerid, pHealth);
   SetPlayerDrunkLevel(playerid, GetPlayerDrunkLevel(playerid) + 2000);
   SetPlayerSpecialAction(playerid,SPECIAL_ACTION_DRINK_BEER);
   ApplyAnimation(playerid,"PED","WALK_DRUNK",4.1,1,1,1,1,1);
   GameTextForPlayer(playerid,"~W~Drunk Mode Is ~g~On!",3000,5);
   SendClientMessage(playerid, 0xFF641AFF, "SERVER: Type /drunk off to Stop being Drunk.");
   SetPlayerHealth(playerid, pHealth =+ 20);
    return 1;
  }