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