AVDL vs AXSM vs JAZZ vs INVA vs MCK

For growth investors, Avadel Pharmaceuticals plc (AVDL) is the stronger pick with 504.

8% revenue growth year-over-year, versus 4. 9% for Jazz Pharmaceuticals plc (JAZZ). Innoviva, Inc. (INVA) offers the better valuation at 6. 9x trailing P/E (11. 9x forward), making it the more compelling value choice. Analysts rate Avadel Pharmaceuticals plc (AVDL) a "Buy" — based on 14 analyst ratings — the highest consensus in this comparison. The "better buy" depends entirely on your goals: growth investors should weight revenue trajectory, value investors should weight P/E and PEG, and income investors should weight dividend yield and streak.

On trailing P/E, Innoviva, Inc.

(INVA) is the cheapest at 6. 9x versus McKesson Corporation at 29. 2x. On forward P/E, Jazz Pharmaceuticals plc is actually cheaper at 9. 4x — notably different from the trailing picture, reflecting expected earnings growth. The PEG ratio (P/E divided by earnings growth rate) is the most growth-adjusted single valuation metric: McKesson Corporation wins at 0. 49x versus Innoviva, Inc. 's 1. 15x — a PEG below 1. 0 traditionally signals the market is underpricing earnings growth.

Over the past 5 years, McKesson Corporation (MCK) delivered a total return of +286.

9%, compared to +30. 0% for Jazz Pharmaceuticals plc (JAZZ). Over 10 years, the gap is even starker: AXSM returned +1886% versus JAZZ's +53. 7%. Past returns do not guarantee future results, and the stock with the higher historical return may already have its best growth priced in.

By beta (market sensitivity over 5 years), McKesson Corporation (MCK) is the lower-risk stock at 0.

04β versus Axsome Therapeutics, Inc. 's 0. 69β — meaning AXSM is approximately 1502% more volatile than MCK relative to the S&P 500. On balance sheet safety, Avadel Pharmaceuticals plc (AVDL) carries a lower debt/equity ratio of 2% versus 3% for Axsome Therapeutics, Inc. — giving it more financial flexibility in a downturn.

By revenue growth (latest reported year), Avadel Pharmaceuticals plc (AVDL) is pulling ahead at 504.

8% versus 4. 9% for Jazz Pharmaceuticals plc (JAZZ). On earnings-per-share growth, the picture is similar: Innoviva, Inc. grew EPS 816. 7% year-over-year, compared to -167. 5% for Jazz Pharmaceuticals plc. Over a 3-year CAGR, AXSM leads at 133. 7% annualised revenue growth. Higher growth typically commands a higher valuation multiple — check whether the premium P/E or P/S is justified by the growth rate using the PEG ratio.

Innoviva, Inc.

(INVA) is the more profitable company, earning 63. 8% net margin versus -28. 9% for Avadel Pharmaceuticals plc — meaning it keeps 63. 8% of every revenue dollar as bottom-line profit. Operating margin tells a similar story: INVA leads at 38. 5% versus -26. 5% for AXSM. At the gross margin level — before operating expenses — AXSM leads at 92. 6%, reflecting greater pricing power or product mix advantage. Stronger margins indicate durable pricing power, lower cost of revenue, or higher mix of software/services. They are one of the clearest signs of business quality.

The PEG ratio (forward P/E divided by expected earnings growth rate) is the most precise measure of undervaluation relative to growth potential.

By this metric, McKesson Corporation (MCK) is the more undervalued stock at a PEG of 0. 49x versus Innoviva, Inc. 's 1. 15x. A PEG below 1. 0 is traditionally considered the threshold for growth-adjusted undervaluation. On forward earnings alone, Jazz Pharmaceuticals plc (JAZZ) trades at 9. 4x forward P/E versus 28. 3x for Avadel Pharmaceuticals plc — 18. 9x cheaper on a one-year earnings basis. Analyst consensus price targets imply the most upside for INVA: 65. 2% to $37. 67.

In this comparison, MCK (0.

4% yield) pays a dividend. AVDL, AXSM, JAZZ, INVA do not pay a meaningful dividend and should not be held primarily for income.

For long-horizon retirement investors, Axsome Therapeutics, Inc.

(AXSM) is the stronger choice — it scores higher on the combination of lower volatility, dividend reliability, and long-term compounding (low volatility (β 0. 69), +1886% 10Y return). Both have compounded well over 10 years (AXSM: +1886%, JAZZ: +53. 7%), confirming both are viable long-term holds — but the lower-volatility option typically results in less emotional selling during corrections. Retirement portfolios generally favour predictability over maximum returns. Consult a financial advisor before making allocation decisions.

Both stocks operate in the Healthcare sector, making this a peer-level intra-sector comparison — the same macro tailwinds and headwinds will affect both.

In terms of investment character: AVDL is a small-cap high-growth stock; AXSM is a mid-cap high-growth stock; JAZZ is a mid-cap quality compounder stock; INVA is a small-cap high-growth stock; MCK is a mid-cap high-growth stock. These fundamental differences mean investors should not choose between them on a single metric — the "better stock" depends entirely on which of these characteristics aligns with your investment strategy.