[Dayrion]

This will block the command for everybody and not per player.

PHP код:

new HealTime[MAX_PLAYERS];

CMD:heal(playerid, params[]) 
{  
    if(HealTime[playerid] > gettime())  
    {
        SendClientMessage(playerid, -1 ,"You need to wait 1 minute before using /heal again");  
    }  
    else  
    {  
    //ADD your command code here setplayerhealth and all other things 
        HealTime[playerid] = gettime() + 60;  
    }  
    return 1;  
}