some believe evidence is biased because researchers are sponsored by drug companies and may selectively publish positive outcomes (Goldacre)
Also lack of independent studies of drug effectiveness also research on psychological therapy may be biased
Serious side effects (-)
Although SSRIs help most people, a small minority will get no benefit.
some people also experience side-effects such as indigestion, blurred vision and loss of sex drive.
These side-effects are usually temporary, however they can be quite distressing for people and for a minority they are long lasting.
For those taking the tricyclicclomipramine, side-effects are more common and can be more serious. For example more than 1 in 10 people experience erection problems and weight gain, 1 in 100 become aggressive and experience heart-related problems.
Cost effective and non disruptive (+)
cheap compared to psychological treatments because many thousands of tablets or liquid doses can be manufactured in the time it takes to conduct one session of a psychological therapy.
Using drugs to treat OCD is therefore good value for public health systems like the NHS and represents a good use of limited funds.
As compared to psychological therapies, SSRIs are also non-disruptive to people's lives. If you wish you can simply take drugs until your symptoms decline.
Effectiveness (-)
Skapinakis carried out a systematic review of outcome studies and concluded that both cognitive and behavioural (exposure) therapies were more effective than SSRIs in the treatment of OCD.