There are many opportunities for work in this field. You could teach in universities, conduct research, work in the pharmaceutical industry, hospitals, or even scientific publishing.* Areas you could go into include assessing the safety of chemicals and medicines, and environmental toxicology.
* Note that some of these options would require more advanced study.
Our graduates work in government and pharmaceutical industries, healthcare and universities. Many pharmacologists work in labs, but others teach, work in publishing or have regulatory roles.