Emotional detatchment sertainly can be a side effect if they’re not working effectively. Anti deppresants don’t work on the principle that they make you feel numb to everything SSRIs such as Swrtraline try to address a chemichal imbalance where it tries to regulate the rate your body produces serotonin (fun fact this is why MDMA isn’t very effective if youre on anti depressants) however if your problem isn’t caused a sertonine imbalance they’ll be ineffective and potentially cause unwanted side effects which is why you should discuss how you feel openly with your gp and tell them if its worse/better/about the same when you’re on meds.
I wasn’t very candid at all and they kept on assuming my meds were working and kept on giving them to me, it wasn’t until I was more candid and honest and outlined every symptom I suffer (no matter how small) that they realised that SSRIs probably wouldn’t do very much for me and I intact had other conditions causing my depression.
If I hadn’t given feedback on how I felt the meds weren’t working (like I had done for years - its kinda hard to gauge if you felt worse before or after you took meds) i may never have been diagnosed with autism and adhd. For the ADHD im currently taking a course of stimulants to increase Dopamine in my brain (whereas Sertraline was trying to address serotonine issues) and low and behold its like someone flicked a switch in my brain
Now I’m not saying you should seek a diagnosis for autism or adhd but rather that giving as detailed feedback as possible is key to helping
If Sertralin is making you feel numb that isn’t supposed to happen that medicine doesn’t work by making you feel numb to your depression, its meant to regulate your brain chemistry to stop your low points from being as chronic or severe.