For many Medicare beneficiaries, prescription medications represent a recurring healthcare expense. Even when a medication has a relatively low copay, taking several prescriptions each month can quickly increase annual spending. This makes prescription drug coverage an important factor when comparing Medicare plans.The cost of a medication may vary depending on the plan, pharmacy, drug tier, and whether the prescription qualifies for preferred pricing. When evaluating TX Medicare advantage plans, reviewing prescription coverage alongside other benefits gives you a more complete picture of potential healthcare expenses.