On click interactions control

Here is the code from my player controller:

 void Update()
     {
         if (gm.paused) return;
         Fire1 = CrossPlatformInputManager.GetButton("Fire1");
 
         if (Fire1 && !isMoving && gm.playerTurn && !gm.isResting && !gm.isBlocking && gm.stamina > 0)
         {
             Interact();
         }
 
         if (inCollision) {
             destinationPosition = transform.position;
             inCollision = false;
         }
 
         MoveObject();
     }

And Interact function:

 void Interact()
     {
         Ray ray = Camera.main.ScreenPointToRay(CrossPlatformInputManager.mousePosition);
         mouseInput = new Vector3 (ray.origin.x, ray.origin.y, transform.position.z);
         RaycastHit2D hit = Physics2D.Raycast(ray.origin, ray.direction);
 
         if ((!hit)) {
             //Debug.Log ("Hit nothing");
             return;
         }
 
         switch (hit.transform.tag.ToString())
         {
         case "Boss":
             if (!hit.collider.isTrigger && inHitbox && gm.bossHp > 0) {
                 Debug.Log ("Hit Boss! " + hit.transform.tag);
                 if (gm.actions < 2) {
                     gm.bossHp -= 20;
                     gm.stamina -= 100;
                     gm.actions++;
                 }
             } else if (hit.collider.isTrigger) {
                 Debug.Log ("Hit Hitbox! " + hit.transform.tag);
                 if (gm.actions < 2) {
                     destinationPosition = mouseInput;
                     gm.actions++;
                 }
             }
             break;
         case "Arena":
             Debug.Log("Hit something: " + hit.transform.tag); 
             if (gm.actions < 2) {
                 destinationPosition = mouseInput;
                 gm.actions++;
             }
             break;
         default:
             Debug.Log ("Hit Unknown");
             break;
         }
     }

What I want to do is that if I click boss it will perform damage action once (right now it just spams it with Update rate, so multiple times in a mouse click). Any workaround for this?