The pressure loss is excessively high in a drip control valve or drip kit valve you're using in your project.
You might have a flow that is too high for that particular model of drip control valve.
Make sure you understand the drip control valve model you selected. Take care to set the correct design pressure to work with that valve. Then make sure you're referencing the charts to see that your flows do not exceed the flow rate that is allowed for that valve.
Keep in mind that drip control valves are based on the flow through the valve – not the design pressure.
If you still have excessive pressure loss, try selecting a different manufacturer. While all drip control valves will show a relatively high pressure loss, some might be less than others, so it's a good idea to explore.