diff --git a/tests/medication-prescribing-workspace.dom.test.tsx b/tests/medication-prescribing-workspace.dom.test.tsx
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+++ b/tests/medication-prescribing-workspace.dom.test.tsx
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+import { fireEvent, render, screen } from "@testing-library/react";
+import { afterEach, describe, expect, it, vi } from "vitest";
+
+import { MedicationPrescribingWorkspace } from "@/components/clinical-dashboard/medication-prescribing-workspace";
+import { PatientProfileProvider } from "@/components/clinical-dashboard/patient-profile-context";
+
+// The prescribing results view filters a medication catalogue through a
+// best/indication/safety/monitoring lens strip. The catalogue hook fetches
+// `/api/medications` (and reads the auth session), so it is mocked with a fixed
+// set of results chosen to land in different filter buckets; the filter strip is
+// the unit under test. Only usePatientProfile needs a real provider (the profile
+// stays empty here, so no per-patient alert badges are computed).
+
+type Result = {
+  id: string;
+  name: string;
+  indication: string;
+  match: string;
+  dose: string;
+  ceiling: string;
+  action: string;
+  actionTone: "danger" | "warning" | "neutral";
+  tone: "teal" | "blue" | "slate";
+};
+
+// Clozapine: danger + exact fit → best, indication, safety (not monitoring).
+const clozapine: Result = {
+  id: "clozapine",
+  name: "Clozapine",
+  indication: "Treatment-resistant schizophrenia",
+  match: "Exact clinical fit",
+  dose: "12.5 mg",
+  ceiling: "900 mg",
+  action: "Avoid abrupt cessation",
+  actionTone: "danger",
+  tone: "teal",
+};
+// Lithium: warning + monitor language → every filter.
+const lithium: Result = {
+  id: "lithium",
+  name: "Lithium",
+  indication: "Bipolar maintenance",
+  match: "Exact clinical fit",
+  dose: "400 mg",
+  ceiling: "1.2 mmol",
+  action: "Monitor serum levels",
+  actionTone: "warning",
+  tone: "blue",
+};
+// Sertraline: neutral + related match → best only.
+const sertraline: Result = {
+  id: "sertraline",
+  name: "Sertraline",
+  indication: "Depression",
+  match: "Related match",
+  dose: "50 mg",
+  ceiling: "200 mg",
+  action: "First-line option",
+  actionTone: "neutral",
+  tone: "slate",
+};
+
+// Cross-mode "also matches" strip is a separate AuthProvider-backed component;
+// stub it so this test isolates the filter strip from that component's auth deps.
+vi.mock("@/components/clinical-dashboard/universal-search-also-matches", () => ({
+  UniversalSearchAlsoMatches: () => null,
+}));
+
+vi.mock("@/components/clinical-dashboard/use-medication-catalog", () => ({
+  useMedicationCatalog: () => ({
+    data: {
+      records: [],
+      matches: [clozapine, lithium, sertraline].map((result) => ({
+        medication: undefined,
+        result,
+        score: 1,
+        reasons: [],
+      })),
+      total: 3,
+      governance: {},
+    },
+    loading: false,
+    error: null,
+  }),
+}));
+
+function renderWorkspace() {
+  return render(
+    <PatientProfileProvider>
+      <MedicationPrescribingWorkspace
+        query="prescribing"
+        loading={false}
+        realDataReady
+        authUnavailable={false}
+        apiUnavailable={false}
+        setupWarning={null}
+        onSuggestedSearch={vi.fn()}
+      />
+    </PatientProfileProvider>,
+  );
+}
+
+// Each result name renders in both the desktop table and the mobile card list,
+// so a visible row appears more than once; a filtered-out row appears zero times.
+function rowVisible(name: string): boolean {
+  return screen.queryAllByText(name).length > 0;
+}
+
+function filterButton(label: string): HTMLElement {
+  return screen.getByRole("button", { name: new RegExp(`^${label}`, "i") });
+}
+
+afterEach(() => {
+  vi.restoreAllMocks();
+});
+
+describe("MedicationPrescribingWorkspace — result filter strip", () => {
+  it("labels each lens with the count of matching results", () => {
+    renderWorkspace();
+    // best = 3 (all), indication = 2 (exact-fit), safety = 2 (non-neutral), monitor = 1.
+    expect(filterButton("Best").textContent).toContain("3");
+    expect(filterButton("Indication").textContent).toContain("2");
+    expect(filterButton("Safety").textContent).toContain("2");
+    expect(filterButton("Monitor").textContent).toContain("1");
+  });
+
+  it("defaults to the Best lens with every result shown", () => {
+    renderWorkspace();
+    expect(filterButton("Best")).toHaveAttribute("aria-pressed", "true");
+    expect(filterButton("Safety")).toHaveAttribute("aria-pressed", "false");
+    expect(rowVisible("Clozapine")).toBe(true);
+    expect(rowVisible("Lithium")).toBe(true);
+    expect(rowVisible("Sertraline")).toBe(true);
+  });
+
+  it("narrows to indication-relevant results and drops related-only matches", () => {
+    renderWorkspace();
+    fireEvent.click(filterButton("Indication"));
+
+    expect(filterButton("Indication")).toHaveAttribute("aria-pressed", "true");
+    expect(filterButton("Best")).toHaveAttribute("aria-pressed", "false");
+    expect(rowVisible("Clozapine")).toBe(true);
+    expect(rowVisible("Lithium")).toBe(true);
+    // Sertraline is a "Related match", so it leaves the Indication lens.
+    expect(rowVisible("Sertraline")).toBe(false);
+  });
+
+  it("narrows the Monitor lens to results with monitoring signals only", () => {
+    renderWorkspace();
+    fireEvent.click(filterButton("Monitor"));
+
+    expect(filterButton("Monitor")).toHaveAttribute("aria-pressed", "true");
+    expect(rowVisible("Lithium")).toBe(true);
+    expect(rowVisible("Clozapine")).toBe(false);
+    expect(rowVisible("Sertraline")).toBe(false);
+  });
+});