Or.. you could just take some as selective as possible SSRI, like citalopram and leave the guesswork out.
I'd hate sounding like a tape recorder but if you're on a SSRI prescribed by a doctor for treatment of depression, anxiety etc. you really should discuss with him/her reducing the dose gradually and eventually Quit and seek other options (for example 5-HTP).
First of all, the commonly known "side-effects" possibly experienced when starting an SSRI up are not "sideish" at all but are due to a direct effect caused by the drugs' inhibition of the gastrointestinal serotonin uptake.
You can mask this vital mess up in your gut (nausea, diarrhoea, constipation) as essential and common "side-effects" if you are a drug maker but if you're dependent on an SSRI yourself you might want to take a look on Jing-Xian Chen, Hui Pan, Paul Wade And Michael Gershons findings (1998) that suggest the long-term administration of the drug(s) will cause ones gut to lose its ability to respond to stimuli that are sensed by serotonin (95% of serotonin in the body is found in the gut, - see the consequence of this).
No wonder millions and millions of people suffer from IBS.