Of the 1 causes of Dark nails that we have listed, we have the following prevalence/incidence information: 1  0 causes are very common diseases. 2  0 causes are common diseases. 3  0 causes are uncommon diseases. 4  0 causes are rare diseases. 5  0 causes are very rare diseases. 6  1 causes have no prevalence information.
Answers (1) Yes, you could take doxycycline for a strep throat but only if your doctor has prescribed it for you. There are however other antibiotics that will work better for a strep throat. Votes: +0.
Answers. Best Answer: Sulfa antibiotics such as Bactrim do NOT cover for the strep infections. They do cover most bacterium that cause sinusitis, however. If you truly think you have strep throat, you should see your doctor for a throat culture and emperic starting of a penicillin, omnicef, or keflex. Source(s): harley_pa Â· 6 years ago. Thumbs up.