Ampicillin vs Tetracycline?

I used to take ampicillin for my acne. I did well for the many years I took it but later latetly it hasn't been helping so I went to the doctor and he prescribed me tetracycline. Is that more effective than amp? And what are the differences between the two? Like the side effects, etc.
Ampicillin is a mild anti-biotic, children, acne etc. Tetracycline
always gave me an upset stomach, clutch w/milk or cracker. I
know it works well.
Ampicillin is useful in acne rosacea but not often works in acne vulgaris, where tetracycline is the time-honored antibiotic of choice. Tetracycline can, however, cause insubstantial sensitivity on occasion, so be careful this summer with your sunblocks. By the process, tetracycline should not be taken with food or milk.
Both Ampicillin and Tetracycline are powerful antibiotics provided the infecting bacteria are sensitive to them. However tetracycline is used for acne more than ampicillin.

Ampicillin is a penicillin antibiotic. It works by killing sensitive bacteria by interfering near formation of the bacteria's cell wall while it is growing. This weakens the cell wall and it ruptures resulting in the death of the microbes.

Possible side effects of Ampicillin :
Inflammation and redness of the tongue; irritation of mouth or throat; mild diarrhea; nausea; second infection; vomiting.

SEVERE side effects would be:
Severe allergic reactions (rash; hives; itching; difficulty breathing; tightness in the chest; swelling of the mouth, frontage, lips, or tongue); bloody stools; severe diarrhea; stomach pain/cramps; vaginal irritation or discharge.

Tetracycline is used to treat many different bacterial infections, such as urinary tract infections, acne, gonorrhea, chlamydia, and others.

Do not use this medication if you are pregnant. It could cause spoil to the unborn baby. Tetracycline can make birth control pills less impressive. Use a second method of birth control while you are taking tetracycline to keep from getting pregnant. Tetracycline passes into breast milk and may affect bone and tooth development surrounded by a nursing baby. Do not take this medication without recitation your doctor if you are breast-feeding a baby. Tetracycline can cause permanent yellowing or graying of the teeth, and it can affect a child's growth. Avoid exposure to sunlight or artificial UV rays (sunlamps or tanning beds). Tetracycline can brand name your skin more sensitive to sunlight and sunburn may result. Use a sunscreen (minimum SPF 15) and wear protective clothing if you must be out in the sun. Do not take iron supplements, multivitamins, calcium supplements, antacids, or laxatives within 2 hours since or after taking tetracycline. These products can make tetracycline less effective. Do not lift any tetracycline after the expiration date on the label has passed. Expired tetracycline can cause a dicey syndrome resulting in damage to the kidneys.

Stop using tetracycline and call your doctor at once if you own any of these serious side effects:
Severe headache, dizziness, blurred vision; fever, chills, body aches, flu symptoms; severe blistering, blistering, and red skin rash; urinating less than usual or not at all; drawn or yellowed skin, dark colored urine, fever, confusion or weakness; severe stomach-ache in your upper stomach spreading to your back, nausea and vomiting, fast heart rate; loss of appetite, jaundice (yellowing of the skin or eyes); or graceful bruising or bleeding, unusual weakness.

Less serious side effects may include:
Sores or swelling in your rectal or genital area; mild nausea, vomiting, diarrhea, or stomach upset; white patch or sores inside your mouth or on your lips; swollen tongue, trouble swallowing; or vaginal itching or discharge.

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