I have completed Pharmacology. And am planning on doing PhD in Biological Science. Once when completing the program will our further job and research all be restricted in that particular area? I hope to work in Clinical Trials and drug research.

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I have completed my post graduation 5 years back and due to family reasons were unable to pursue my higher studies. I want to badly study PhD. I had applied to various universities 2 years back and had received admission but failed to get scholarship. I dropped the idea because paying for my studies would be every expensive. And many people both students and professionals mentioned that its not worth doing PhD if I pay for it myself. But the desire to do PhD has not left me. I am ready to pay for my studies. I would like to know if I will be able to pay back my loan, meaning will there be job opportunities. I would like to work and do not want to pay nearly 60,000 pounds and end up with out a job. but if the future is good for PhD graduates then I wouldn't mind spending money. I do hope someone can help me . I am confused is it worth studying by paying my own fees??????