TEK IMAGE / SCIENCE PHOTO LIBRARY TEK IMAGE / SCIENCE PHOTO LIBRARY
Pills. Test tubes containing various medical pills and capsules. In the foreground at centre is a test tube containing cod liver oil tablets. At bottom centre are capsules for treating a cough. The test tube at lower right contains aspirin, a type of painkiller. At upper left are capsules which contain vitamin supplements. Taken by mouth, pills are an effective way of administering drugs which are not destroyed by the digestive system.
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