// Seta a variável no topo:
new HealthPickup[MAX_HEALTH_PICKUPS] = {-1, ...};

// DropPlayerHealth
stock DropPlayerHealth(playerid)
{
    new Float:killedx, Float:killedy, Float:killedz;
    GetPlayerPos(playerid, killedx, killedy, killedz);

    new PickupFree = -1;
    for(new i = 0; i < MAX_HEALTH_PICKUPS; i++)
    {
        if(HealthPickup[i] == -1)
        {
            PickupFree = i;
            break;
        }
    }
    if(PickupFree != -1)
    {
        HealthPickup[PickupFree] = CreatePickup(1240, 1, killedx+random(2), killedy-random(2), killedz);
        HealthPickupsTimer[PickupFree] = SetTimerEx("ClearHealthPickup", 30000, false, "i", PickupFree);
    }
}

// ClearHealthPickup
public ClearHealthPickup(id)
{
    if(HealthPickup[id] != -1) {
        DestroyPickup(HealthPickup[id]);
        HealthPickup[id] = -1;
    }
    return 1;
}

// public OnPlayerPickUpPickup(playerid, pickupid), muda essa parte
            for(new i = 0; i < MAX_HEALTH_PICKUPS; i++)
            {
                if(pickupid == HealthPickup[i])
                {
                    new Float:health;
                    GetPlayerHealth(playerid, health);
                    if(health < 60)
                    {
                        SetPlayerHealth(playerid, health+40.0);
                    }
                    else
                    {
                        SetPlayerHealth(playerid, 100.0);
                    }
                    DestroyPickup(HealthPickup[i]);
                    KillTimer(HealthPickupsTimer[i]);
                    HealthPickup[i] = -1;
                    break;
                }
            }