Linear TV vs. CTV for Pharma DTC: How to Decide the Shift

Every DTC brand team has had the conversation. Linear audiences are aging and shrinking, streaming keeps growing, and someone asks why the brand still spends most of its TV budget on cable networks. The answer is rarely "all linear" or "all CTV." It depends on the patients, the creative, and the measurement setup.

Linear TV vs. CTV for pharma: what actually differs

Audience age and condition profile

Start with the patients. If the condition is mostly diagnosed in adults over 65 (many cardiovascular, ophthalmic, and oncology indications), linear still reaches a large share of them, and the cost per reached target household can be low because so many are watching. Moving that budget to CTV can reduce reach.

If the condition skews toward adults under 50 (many dermatology, migraine, and mental health indications), more of those patients have reduced or stopped linear viewing. Linear spend increasingly buys households outside the audience. CTV's reach and targeting advantage grows.

Condition prevalence matters too. For a common condition, broad linear reach is efficient because a large share of any audience is relevant. For a narrow condition, most linear impressions are wasted, and household targeting on CTV gets more attractive, with the caveats in CTV household graphs and healthcare audience targeting.

Cost: compare per target household, not per impression

A hypothetical comparison. Linear at a $25 CPM, where 10 percent of reached households fit the target profile, costs $250 per thousand target household impressions. CTV at $50 all-in, where 30 percent fit, costs about $167. CTV wins. Change the assumption: if the condition is common and 35 percent of linear households fit, linear costs about $71 per thousand target impressions, and CTV would need more than 70 percent targeting accuracy to match. Run the numbers for your condition, and be skeptical of the accuracy figure on the CTV side until you have tested the segment.

Fair balance length and spot availability

This is the factor brand teams miss most often. A product claim spot must carry the major statement in audio, and FDA's 2023 final rule on presenting the major statement in a clear, conspicuous, and neutral way added standards such as presenting it in audio and text together. Check the current regulation text and your regulatory team's reading, as of 2026, before planning. The result is that many approved product claim spots run 60 seconds or longer.

Linear inventory accepts those lengths routinely. CTV inventory does not always. Many streaming pods are built around 15s and 30s units, and some publishers charge a premium or limit availability for 60s. If your only approved asset is a 75, check spot acceptance by partner before shifting budget. Otherwise the CTV budget ends up running a shorter unbranded or reminder cut, which is a different campaign. Pharma CTV creative: length, fair balance, and interactive formats covers the options.

Measurement: can you prove what CTV adds?

Linear is usually measured through MMM and geo tests. CTV gives you household exposure files that can be matched to prescription data. That is a real advantage, but only if you set up the comparison properly. A brand that shifts 30 percent of budget into CTV and then reads matched panel "lift" from the CTV vendor will almost always see a positive number, because exposed households differ from unexposed ones.

A better approach is to decide the measurement design before the shift. Use a geo test that varies CTV weight across markets while holding linear constant, or a household holdout within CTV. Feed the result into MMM. Tools for measuring CTV incrementality compares the methods. Also measure unique reach: the share of CTV households that linear did not reach. Measuring reach and frequency across linear TV, CTV, and online video covers how.

A decision table for the shift

How to run the shift without losing reach

1. Pull a cross-platform reach report for the current linear plan by age band.
2. Estimate the share of target patients who are light or non-linear viewers.
3. Confirm spot length acceptance for each CTV partner.
4. Move a defined test share, often 15 to 25 percent, with a geo or holdout design.
5. Read unique reach and incremental outcome, then decide the next step.

The scenario planning guide helps when the budget itself is uncertain, and the series guide on CTV and OTT healthcare advertising covers buying routes.

Practical takeaway

Before the next upfront or annual plan, calculate cost per thousand target households for linear and CTV using your own condition prevalence and a tested targeting accuracy figure. If CTV only wins under the vendor's accuracy claim, run a test cell first instead of shifting the budget.

Editorial note. Analysis and frameworks are the author's own and do not represent Acxiom or any current or former employer, client, or named platform. Examples labeled hypothetical or illustrative are not results from real campaigns. Nothing here is legal, regulatory, or medical advice.