public static function addMedicine($input)
 {
     $medicineName = $input['medicineName'];
     $medicine = medicine::where('medicineName', $medicineName)->first();
     $medicineId = $medicine->medicineId;
     $input['medicineId'] = $medicineId;
     $medicinePrescription = medicinePrescription::create($input);
     return $medicinePrescription;
 }