Penicillin tablets generally refer to penicillin V potassium tablets, which can be taken by lung cancer patients if they are not allergic to penicillin. If lung cancer patients are allergic to penicillin, they cannot take Penicillin V potassium tablets. Penicillin V potassium tablets can be used to treat diseases such as pharyngitis, tonsillitis, dengue (acute infectious disease, which can be seen that the skin is red like painted) and scarlet fever caused by streptococcus infection, as well as bronchitis and pneumonia caused by Streptococcus pneumoniae infection, or soft tissue skin infection caused by sensitive staphylococcus infection. Generally, lung cancer patients are not allergic to penicillins, and they can take Penicillin V potassium tablets as prescribed by doctor for treatment in case of the above mentioned infections in the organism. If lung cancer patients are allergic to penicillin drugs, they should avoid taking penicillin V potassium tablets for treatment, so as to avoid allergic reactions such as respiratory difficulty, skin rash and itching of skin. It is suggested that lung cancer patients need to consult doctor in time, and doctor will judge whether they can take penicillin V potassium tablets treatment according to their condition. In addition, lung cancer patients taking penicillin V potassium tablets also need to pay attention to the possible adverse reactions such as nausea and vomiting, diarrhea, hemolytic anemia and so on.