The short answer is yes. But ...
Published by Tim Acevedo, Co-Owner at TG Water Additives, LLC
The short answer is yes. But for how long and how effectively is another concern. I suggest to do an analysis of the main pharma compounds present in the water. If you have that, you need to determine if there are any that may be harmful to bacteria. They need to be oxidized.
Instead of biochar, use a high surface area biocarrier, like PVA-gel (Kuraray). It's very effective for treatment of high strength wastewater. This will give you the best results.
As commented by others, you may also try using O3, I promote ADP, using O3/UV, to produce hydroxyl ions.
Depending on the level of pollutants, you may need a combination of both.
If you have the opportunity to do bench scale testing do so. Depending on your location, I can put you in contact with the biocarrier company.
I hope this helps.