From the Right most navigation bar, select diagnostics as shown below.
The medic will take you to the diagnostics segment as shown in the image below.
From the left navigation bar select drugs as shown in the image below.
Now to add a drug, press the add button as shown below.
The medic will create a new row as shown in the image below.
The doctors need to write the name of the drug that they want to add to encounters. As they start writing, the medic will start giving them suggestions.
After selecting the drug, the doctor can write instructions as shown in the image below.
Press the Done button as highlighted in the aforementioned image.
The Medic will add the drug to the encounter as shown in the image below.