Daniel F replied: "it is VERY probable - they have a similar chemical structure - i would suggest that you have a 'skin test' to determine which antibiotics you are allergic too"

JAMES P replied: "I wish you would have included why you are sick like the flu, congestion, sinuses infected. There may be something you can do without any antibiotics.You could probably take a dose pack of Erythromycin. My daughter-in-law takes it because she is allergic to penicillin. Your Doctor should know what to prescibe, if you have to go to the Doctor's Office. There are some home remedy's, so if you could take the time and add where you are sick may help. OK. For the sore throat, you can gargle with salt water, about 8 ounces of warm water in a glass and just shake about five times, some salt from the salt shaker, sttir and gargle. This will only help with the pain. For an infected throat, same amount of warm water, add a tablespoon of Heinz Apple Cider Vinegar, stir an gargle til it's gone. Even after about say the third gargle, swallot it. This will kill any germs that breaks loose and travels farther down. You should do these two things seperately 3 times a day. For the congested sinus, place a pan of water on the stove, bring it to a boil and let boil for at least two minuites or a minute and a half. During this time, using the salt shaker, shake in about 10 times and stir. Use a medium size pan. Make that at least 10 times or twelve. Turn off the heat, and steam will begin to rise. Lean down, not so close you get burned, just low enough to inhale the steam first through your nostrils, mouth closed. When you exhale, straighten up and blow out because if you stay down next to the pan, you'll blow the steam in all directions and have to wait until it is one solid mass again. Then breathe deeply into both the nostrils and mouth to get into the lungs and sinuses. Have some tissues handy, because you will be blowing your nose and coughing up more flem. Do this also three times a day. You have to keep that mucus loose so this will help that part. At night, now this is what I do, it smells, but if it works, who cares. I rub across my forehead, along the temples, down from my throat's adams apple down the center of my chest,and db a small amount just below the nostril openings. Cover up and go to sleep. In the morning take a warm to slightly hot shower and more mucs will come up. Zinc is good to fight colds, they even make a zinc tablet especially for that. Feel along beneath your jaw bone to see if those glands are swollen. If they are, you can but at a Pharmacy what they call Iodex. It looks like black grese. You rub that on the glands, wrap something around your neck like an old scarf and leave it covered. It is basically used to draw boils, but it also draws infections from the glands. Get yourself some Lipton Chicken Noodle Cup Of Soup and drink that several times a day. If you have a chest cold, you break it up with hot chicken soup. Drink plenty of liquids to keep the throat moist and in a couple of days, you should feel much better. I certainly hope so Parisy. Best to you and good luck young one."