diff --git a/medical_prescription/prescription/constants.py b/medical_prescription/prescription/constants.py
index a3abf206..9e322cbd 100644
--- a/medical_prescription/prescription/constants.py
+++ b/medical_prescription/prescription/constants.py
@@ -84,3 +84,6 @@
 # 250MB - 214958080
 # 500MB - 429916160
 MAX_UPLOAD_SIZE = 20971520
+
+# Medicine form validation.
+MEDICINE_AUTOCOMPLETE = 'Medicine must be in our system.'
diff --git a/medical_prescription/prescription/templates/create_prescription_copy.html b/medical_prescription/prescription/templates/create_prescription_copy.html
index a1635936..a1fd0538 100644
--- a/medical_prescription/prescription/templates/create_prescription_copy.html
+++ b/medical_prescription/prescription/templates/create_prescription_copy.html
@@ -4,6 +4,7 @@
 <link rel="stylesheet" href="{% static "prescription/css/modal_prescription.css" %}">
 <link rel="stylesheet" href="{% static "prescription/css/select.css" %}">
 <link rel="stylesheet" href="{% static "prescription/css/hidden_email.css" %}">
+<link rel="stylesheet" href="{% static "prescription/css/error_mensage.css" %}">
 
 <script>
         var sortable = "{% static "prescription/js/sortable.js" %}";
@@ -33,6 +34,10 @@ <h3 class="modal-title">Prescrição</h3>
         <!-- This fields are responsable off patient information. -->
         {% csrf_token %}
         <div class="form-group">
+            {% if prescription_form.non_field_errors  %}
+            <div class="alert alert-danger" role="alert">{{ prescription_form.non_field_errors }}</div>
+            {% endif %}
+
           {% for error in prescription_form.patient.errors %}
           <div class="alert alert-danger" role="alert">{{error}}</div>
           {% endfor %}
diff --git a/medical_prescription/prescription/templates/show_prescription_medicine.html b/medical_prescription/prescription/templates/show_prescription_medicine.html
index 0ccaaeff..570b6f6f 100644
--- a/medical_prescription/prescription/templates/show_prescription_medicine.html
+++ b/medical_prescription/prescription/templates/show_prescription_medicine.html
@@ -3,6 +3,7 @@
 <link rel="stylesheet" href="{% static "prescription/css/autocomplete.css" %}">
 <link rel="stylesheet" href="{% static "prescription/css/modal_prescription.css" %}">
 <link rel="stylesheet" href="{% static "prescription/css/select.css" %}">
+<link rel="stylesheet" href="{% static "prescription/css/error_mensage.css" %}">
 <link rel="stylesheet" href="{% static "prescription/css/hidden_email.css" %}">
 
 <script>
@@ -35,6 +36,10 @@ <h3 class="modal-title">Prescrição</h3>
         <!-- This fields are responsable off patient information. -->
         {% csrf_token %}
         <div class="form-group">
+            {% if prescription_form.non_field_errors  %}
+            <div class="alert alert-danger" role="alert">{{ prescription_form.non_field_errors }}</div>
+            {% endif %}
+
           {% for error in prescription_form.patient.errors %}
           <div class="alert alert-danger" role="alert">{{error}}</div>
           {% endfor %}
diff --git a/medical_prescription/prescription/validators/prescriptionbasevalidator.py b/medical_prescription/prescription/validators/prescriptionbasevalidator.py
index 0568fa66..24077e59 100644
--- a/medical_prescription/prescription/validators/prescriptionbasevalidator.py
+++ b/medical_prescription/prescription/validators/prescriptionbasevalidator.py
@@ -46,6 +46,9 @@ def validate_length_prescription(self, medicine, exam, recommendation):
                 else:
                     # Nothing to do.
                     pass
+        else:
+            # Nothing to do.
+            pass
 
         if not valid:
             raise forms.ValidationError(_(constants.EMPTY_PRESCRIPTION))
diff --git a/medical_prescription/static/prescription/css/error_mensage.css b/medical_prescription/static/prescription/css/error_mensage.css
new file mode 100644
index 00000000..3d75b51d
--- /dev/null
+++ b/medical_prescription/static/prescription/css/error_mensage.css
@@ -0,0 +1,3 @@
+.nonfield {
+    list-style:outside none none;
+}