How long does it take antibiotics to leave your system?
Posted on September 28th, 2008 in Answers
Schmitty V asked:
I take the pill, but I'm on my period week and my cycle of antibiotics will end 24 hours before I have to start my new cycle of pills. Need to know if I should still use a backup birth control method.
I take the pill, but I'm on my period week and my cycle of antibiotics will end 24 hours before I have to start my new cycle of pills. Need to know if I should still use a backup birth control method.
This post has 4 comments
September 28th, 2008
Always use a back up meathod if you are unsure. Besides, how hard is it to just use a condom?
September 29th, 2008
3 to 7 days, so you might use extra protection..
September 30th, 2008
RE how long before anti-biotics leave the system, I think it’s 24 hrs….re backup birth control ==== ABSOLUTELY!
Ok, hope this helped!
October 2nd, 2008
Here are some of the popular antibiotics and the lasting time per dose.
• Aztreonam: 1–2 gm every 6–12 hours, injected into a vein, over a 20–60 minute-period.
• Cefepime: 500 mg to 2 gm, injected into a vein or muscle, every 8–12 hours for 7–10 days.
• Ceftazidime: 250 mg to 2 gm, injected into a vein or muscle, every 8–12 hours.
• Ceftriaxone: 1–2 gm, injected into a vein or muscle, every 24 hours.
• Ciprofloxacin: 500–750 mg of the tablet or suspension, every 12 hours, for 3–28 days, taken two hours after meals with 8 oz of water; bone and joint infections usually are treated for at least 4–6 weeks; 200–400 mg injected every 8–12 hours.
• Clindamycin: 150–300 mg of capsule or solution, every six hours; 300–600 mg every six to eight hours or 900 mg every eight hours, injected into a vein or muscle.
• Gentamicin: dosage determined by body weight, every 8–24 hours for at least 7–10 days, injected into a vein or muscle.
• Metronidazole: for bacterial infections, 7.5 mg per kg (3.4 mg per lb) of body weight up to a maximum of 1 gm, every six hours for at least seven days (capsules or tablets); 15 mg per kg (6.8 mg per lb) for the first dose, followed by half that dosage every six hours for at least seven days (injected into a vein); for protozoal infections caused by amebas, 500–750 mg of oral medicine, three times per day for 5–10 days; for trichomoniasis, 2 gm for one day or 250 mg three times per day for seven days (oral medicine); extended-release tablets for vaginal bacterial infections, 750 mg once a day for seven days.
• Pentamidine: for treating PCP, 4 mg per kg (1.8 mg per lb) of body weight, once per day for 14–21 days, injected into a vein over one to two hours, while lying down.
• Pyrimethamine: for toxoplasmosis, 25–200 mg tablets, taken with other medicine, for several weeks.
• Sulfadiazine: for bacterial and protozoal infections, 2–4 gm for the first dose, followed by 1 gm every four to six hours (tablets).
• SMZ-TMP: 800 mg of sulfamethoxazole and 160 mg of trimethoprim, (tablet or oral suspension), every 12 hours for bacterial infections and every 24 hours for prevention of PCP; dosage based on body weight for PCP treatment; injections based on body weight, every six, eight or 12 hours for bacterial infections and every six hours for PCP treatment.
• Trimethoprim: 100 mg tablet every 12 hours for 10 days; for prevention of urinary tract infections, once a
day for a long period.
Vancomycin: 7.5 mg per kg (3.4 mg per lb) of body weight, or 500 mg–1 gram, injected or taken orally, every 6–12 hours.
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