Patent Expirations and Product Pipeline: Pfizer faces significant revenue cliffs by 2030 due to patent expirations on key drugs, with its future growth heavily dependent on successful new drug launches and innovation to offset these declines.

Global Economic Conditions and Healthcare Spending: Broad economic factors like inflation and consumer spending influence healthcare expenditures, which can impact Pfizer's revenue streams. A strong global economy generally supports pharmaceutical sales, while economic downturns pose challenges.

Regulatory Environment and Drug Pricing Pressure: Ongoing regulatory changes, particularly aggressive drug pricing negotiations and reforms in key markets, can constrain Pfizer's revenue growth and profit margins.