Usually Escitalopram is effective within 20 mg, however in certain cases it can be increased to 40 mg and above as per psychiatrist discretion and Psychiatric illness. In cases of ocd it is a common practice. Overall it is quite safe.
Next Steps
Continue with medication if you are having good response. If you still have doubts consult a psychiatrist.
Health Tips
Get your blood investigations done as per psychiatrist advise as there is a low risk at high doses.