Tramadol drops, injections and some tablets and capsules will start to work within 30 to 60 minutes. They’re used for pain that is expected to last for only a short time. You may be told to take this type of tramadol only if you need it for pain that can come and go.
https://www.nhs.uk/medicines/tramadol/how-and-when-to-take-tramadol/

