<s>[INST] I have been using switch 200 for treatment of chest and throat infections in India for six days with one tablet morning and evening plus deriphyline 300 SR the same doze and cured my chest infection. Now I am in usa and have developed the same infection due to change of climate and allergies. Can I take the same medicines now again and how to get them here in absence of prescriptions ,when I have to be here for one month more.kindly guide....thanks [/INST] Hello, Welcome to the forum. You may feel that you are suffering from the same infection, but it may not be true. You should consult a local general physician so that you get physically examined. Furthermore, you need anti-allergic and anti bionics. If you have a prescription, and you have been physically examined it will be better. You should not take any medication by yourself and should follow the doctors prescription strictly. Do alert your treating doctor if you have history of any past illness or have allergy to some medicines or food. Hope you have the reports (records) of your previous investigations with you. It will be helpful for your treatment. You may need a few investigations to be done. You should have warm saline gargle three times a day. Furthermore, you can also use an antiseptic mouth wash for gargling. Have a nice day. Take care. </s>