Hi
I've been taking Sertraline for about four weeks now. I work as a permanent employee too.
I have to say, I felt extremely bad during the first stages, I know what you're going through. I was originally on Fluoxetine, But during the first two weeks, this made me unable to work, drowsy, dizzy & tired, pretty much had a bad term with these so I was put straight on to Sertaline.
I started on the small dose of 50mg a day, during the first few weeks it was extremely hard. I had various stages of side effects, heaviness, couldn't move much, couldn't drive anywhere, no motivation, & difficulty with orgasm (which was a big pain....).
I had some very bad turns, I've been suicidal, taken overdoses and hurt myself very bad. I can tell you that these do make you feel worse before they make you feel better. I haven't started feeling any better yet after having my dosage doubled (100mg now) since this. Luckily I've had support from my employer, and family and friends - This makes things a lot easier by the way, if you have someone to talk to about what's going on.
I've spoken to my GP & also psychiatrist, they have advised me to allow up to 6-8 weeks before feeling any better (I was prescribed diazepam before suicidal tendancies appeared, but got off it as soon as I could to stop the withdrawel).
You can have various side effects on these, if there's any serious ones, you should speak to a doctor as soon as possible. I've had to have numerous visits and been thrown back and fourth between crisis teams, my GP, psychiatrist, but in the end you will get there. Just persevere.
If you have any of the below symptons you need to either speak to your GP straight away, or call 111 to speak with a doctor to see whether you need medical attention or not (better to be safe than sorry, they can be helpful and have a doctor speak to you within the hour).
very stiff (rigid) muscles, high fever, sweating, confusion, fast or uneven heartbeats, feeling like you might pass out;
agitation, hallucinations, fever, overactive reflexes, tremors;
nausea, vomiting, diarrhea, loss of appetite, feeling unsteady, loss of coordination; or
headache, trouble concentrating, memory problems, weakness, fainting, seizure, shallow breathing or breathing that stops.
I hope my experiences and information help you and any others.
P.s. - Over the difficulty with orgasms, it was more of a mind issue, after managing to deal with this I am now fine - no reported signs of impotency either.
Thanks.