diff --git a/.idea/deploymentTargetDropDown.xml b/.idea/deploymentTargetDropDown.xml
index 0c0c338..cc1cbde 100644
--- a/.idea/deploymentTargetDropDown.xml
+++ b/.idea/deploymentTargetDropDown.xml
@@ -3,7 +3,20 @@
   <component name="deploymentTargetDropDown">
     <value>
       <entry key="app">
-        <State />
+        <State>
+          <targetSelectedWithDropDown>
+            <Target>
+              <type value="QUICK_BOOT_TARGET" />
+              <deviceKey>
+                <Key>
+                  <type value="VIRTUAL_DEVICE_PATH" />
+                  <value value="C:\Users\USER\.android\avd\Pixel_3a_API_34_extension_level_7_x86_64.avd" />
+                </Key>
+              </deviceKey>
+            </Target>
+          </targetSelectedWithDropDown>
+          <timeTargetWasSelectedWithDropDown value="2024-06-02T23:30:13.381406600Z" />
+        </State>
       </entry>
     </value>
   </component>
diff --git a/app/src/main/java/com/terratenientes/medicalhealth/MainActivity.kt b/app/src/main/java/com/terratenientes/medicalhealth/MainActivity.kt
index ad5c5cb..8cdc1c9 100644
--- a/app/src/main/java/com/terratenientes/medicalhealth/MainActivity.kt
+++ b/app/src/main/java/com/terratenientes/medicalhealth/MainActivity.kt
@@ -40,6 +40,7 @@ class MainActivity : AppCompatActivity() {
         //dbRecetas.crearTablaReceta()
         //db.createTable()
         //dbHistorial.crearTablaHistorial()
+        //db.crearTablaPacientes()
         binding.btnIniciarSesion.setOnClickListener {
             historial.fecha = obtenerFecha()
             var res = db.validarDatos(
diff --git a/app/src/main/java/com/terratenientes/medicalhealth/PacientePrincipalActivity.kt b/app/src/main/java/com/terratenientes/medicalhealth/PacientePrincipalActivity.kt
index d6a9eda..eee2c84 100644
--- a/app/src/main/java/com/terratenientes/medicalhealth/PacientePrincipalActivity.kt
+++ b/app/src/main/java/com/terratenientes/medicalhealth/PacientePrincipalActivity.kt
@@ -56,6 +56,9 @@ class PacientePrincipalActivity : AppCompatActivity(), CellClickListener {
 
         binding.rvRecetasPaciente.layoutManager=LinearLayoutManager(this)
         binding.rvRecetasPaciente.adapter= recycleAdapter
+        binding.ivLogout.setOnClickListener {
+            finish()
+        }
     }
 
     override fun onResume() {
diff --git a/app/src/main/java/com/terratenientes/medicalhealth/PrincipalActivity.kt b/app/src/main/java/com/terratenientes/medicalhealth/PrincipalActivity.kt
index 7b64519..47f98b9 100644
--- a/app/src/main/java/com/terratenientes/medicalhealth/PrincipalActivity.kt
+++ b/app/src/main/java/com/terratenientes/medicalhealth/PrincipalActivity.kt
@@ -45,6 +45,10 @@ class PrincipalActivity : AppCompatActivity() {
         historial = Historial("Doctor", null,"Se inicio la actividad de menu principal", obtenerFecha())
         datosDoctor(intent.getStringExtra("Cedula").toString())
         añadirHistorial(historial)
+        binding.ivLogout.setOnClickListener {
+            finish()
+            Toast.makeText(this@PrincipalActivity,"Sesión cerrada", Toast.LENGTH_LONG).show()
+        }
         binding.ivPacientes.setOnClickListener {
             val intent = Intent(this@PrincipalActivity, PacienteActivity::class.java)
             intent.putExtra("NombreDoctor", nombreDoctor)
diff --git a/app/src/main/java/com/terratenientes/medicalhealth/RegistrarDActivity.kt b/app/src/main/java/com/terratenientes/medicalhealth/RegistrarDActivity.kt
index bff7828..55eaa3a 100644
--- a/app/src/main/java/com/terratenientes/medicalhealth/RegistrarDActivity.kt
+++ b/app/src/main/java/com/terratenientes/medicalhealth/RegistrarDActivity.kt
@@ -29,7 +29,6 @@ class RegistrarDActivity : AppCompatActivity() {
         dbHistorial = HistorialDataBaseHelper(this@RegistrarDActivity)
         historial = Historial(null, null, "Se abrio la actividad de registro", obtenerFecha())
         añadirHistorial(historial)
-        db= DoctorDataBaseHelper(this@RegistrarDActivity)
         db = DoctorDataBaseHelper(this@RegistrarDActivity)
 
         binding.btnRegistrar.setOnClickListener {
@@ -46,14 +45,10 @@ class RegistrarDActivity : AppCompatActivity() {
         val domicilio = binding.etDomicilio.text.toString()
         val contrasena= binding.etContrasenaRegistro.text.toString()
         val usuario= Doctor(cedula,nombre,apellido,telefono,domicilio.toInt())
-        db.agregarDoctores(usuario,contrasena)
-        Toast.makeText(this@RegistrarDActivity,"USUARIO AGREGADO",Toast.LENGTH_LONG).show()
-        historial.eventoRealizado = "Se registraron los datos de un doctor"
-        historial.fecha = obtenerFecha()
-        historial.tipoUsuario = "Doctor"
-        historial.nombreUsuario = nombre
-        añadirHistorial(historial)
-        val contrasena = binding.etContrasenaRegistro.text.toString()
+        /*db.agregarDoctores(usuario,contrasena)
+        Toast.makeText(this@RegistrarDActivity,"USUARIO AGREGADO",Toast.LENGTH_LONG).show()*/
+
+
 
         if (cedula.isEmpty() || nombre.isEmpty() || apellido.isEmpty() || telefono.isEmpty() || domicilio.isEmpty() || contrasena.isEmpty()) {
             Toast.makeText(this, "Todos los campos son obligatorios.", Toast.LENGTH_LONG).show()
@@ -95,6 +90,11 @@ class RegistrarDActivity : AppCompatActivity() {
 
         val usuario = Doctor(cedula, nombre, apellido, telefono, domicilio.toInt())
         db.agregarDoctores(usuario, contrasena)
+        historial.eventoRealizado = "Se registraron los datos de un doctor"
+        historial.fecha = obtenerFecha()
+        historial.tipoUsuario = "Doctor"
+        historial.nombreUsuario = nombre
+        añadirHistorial(historial)
 
         Toast.makeText(this@RegistrarDActivity, "USUARIO AGREGADO", Toast.LENGTH_LONG).show()
         finish()
diff --git a/app/src/main/res/drawable/logout.xml b/app/src/main/res/drawable/logout.xml
new file mode 100644
index 0000000..8a42cf9
--- /dev/null
+++ b/app/src/main/res/drawable/logout.xml
@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24">
+  <path
+      android:fillColor="#FF000000"
+      android:pathData="M17,7L15.59,8.41L18.17,11H8V13H18.17L15.59,15.58L17,17L22,12M4,5H12V3H4C2.9,3 2,3.9 2,5V19C2,20.1 2.9,21 4,21H12V19H4V5Z"/>
+</vector>
diff --git a/app/src/main/res/layout/activity_paciente_principal.xml b/app/src/main/res/layout/activity_paciente_principal.xml
index 86a433f..92e9b0c 100644
--- a/app/src/main/res/layout/activity_paciente_principal.xml
+++ b/app/src/main/res/layout/activity_paciente_principal.xml
@@ -7,12 +7,20 @@
     android:layout_height="match_parent"
     tools:context=".PacientePrincipalActivity">
 
+    <ImageView
+        android:id="@+id/iv_logout"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:paddingStart="350dp"
+        android:src="@drawable/logout"/>
+
 
     <androidx.recyclerview.widget.RecyclerView
         android:id="@+id/rv_recetas_paciente"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:scrollbars="vertical"
+        android:layout_below="@id/iv_logout"
         tools:listitem="@layout/rc_receta_item" />
 
 
diff --git a/app/src/main/res/layout/activity_principal.xml b/app/src/main/res/layout/activity_principal.xml
index db2ed2c..081ba38 100644
--- a/app/src/main/res/layout/activity_principal.xml
+++ b/app/src/main/res/layout/activity_principal.xml
@@ -7,22 +7,34 @@
     android:orientation="vertical"
     tools:context="PrincipalActivity">
 
-    <TextView
+    <LinearLayout
         android:layout_width="match_parent"
-        android:layout_height="wrap_content"
-        android:text="@string/app_name"
-        android:gravity="center"
-        android:layout_marginTop="5dp"
-        android:layout_marginBottom="20dp"
-        android:textColor="@color/primaryColor"
-        android:textSize="30dp"/>
+        android:layout_height="40dp"
+        android:orientation="horizontal">
+        <TextView
+            android:layout_width="350dp"
+            android:layout_height="wrap_content"
+            android:text="@string/app_name"
+            android:paddingStart="50dp"
+            android:gravity="center"
+            android:textColor="@color/primaryColor"
+            android:textSize="30dp"/>
+        <ImageView
+            android:id="@+id/iv_logout"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginStart="10dp"
+            android:src="@drawable/logout"
+            android:layout_gravity="center_vertical"/>
+    </LinearLayout>
 
 
-    <!--<ImageView
+
+    <ImageView
         android:layout_width="match_parent"
         android:layout_height="150dp"
         android:layout_margin="20dp"
-        android:src="@drawable/doctor"/>-->
+        android:src="@drawable/doctor"/>
 
     <GridLayout
         android:layout_width="match_parent"
@@ -89,7 +101,7 @@
         android:layout_height="wrap_content"
         android:background="@drawable/radius_tv"
         android:backgroundTint="@color/primaryColor"
-        android:layout_marginTop="80dp"
+        android:layout_marginTop="130dp"
         android:columnCount="3"
         android:rowCount="2">
 
diff --git a/app/src/main/res/layout/rc_receta_item.xml b/app/src/main/res/layout/rc_receta_item.xml
index d717f76..8cbb8a7 100644
--- a/app/src/main/res/layout/rc_receta_item.xml
+++ b/app/src/main/res/layout/rc_receta_item.xml
@@ -81,8 +81,8 @@
 
         <ImageView
             android:id="@+id/iv_correo_receta"
-            android:layout_width="wrap_content"
-            android:layout_height="wrap_content"
+            android:layout_width="14dp"
+            android:layout_height="14dp"
             android:layout_marginStart="100dp"
             android:layout_marginTop="2dp"
             android:layout_marginEnd="24dp"
@@ -90,10 +90,10 @@
             android:background="#3F51B5"
             app:layout_constraintBottom_toBottomOf="parent"
             app:layout_constraintEnd_toEndOf="parent"
-            app:layout_constraintHorizontal_bias="0.815"
+            app:layout_constraintHorizontal_bias="0.831"
             app:layout_constraintStart_toStartOf="parent"
             app:layout_constraintTop_toTopOf="parent"
-            app:layout_constraintVertical_bias="0.529"
+            app:layout_constraintVertical_bias="0.522"
             app:srcCompat="@android:drawable/ic_dialog_email" />
 
         <ImageView
@@ -107,7 +107,7 @@
             app:layout_constraintHorizontal_bias="1.0"
             app:layout_constraintStart_toStartOf="parent"
             app:layout_constraintTop_toTopOf="parent"
-            app:layout_constraintVertical_bias="0.593" />
+            app:layout_constraintVertical_bias="0.581" />
 
         <ImageView
             android:id="@+id/iv_eliminar_receta"