How long does doxycycline stay in your system after 3 weeks of taking it?
As others have written, the half life of doxycycline is about 18 hours. That means that every 18 hours the level drops in half. After 4 or 5 half lives a drug reaches steady state. That means that’s how long it takes to reach a steady level after you start taking it. So after 5 x 18 hours = 90 hours, or about 4 days, you will reach the maximum level you will attain for whatever dose you are taking. Whether you take it for 3 weeks, or 3 years, it will remain at the same level (assuming your body continues to break down the medications the same).When you ask how long it stays in your system, it depends on what you mean exactly.Let say that the day you stop taking the doxycycline your level is 100% of it’s maximum. Here’s how it would decline:18 hours - 50%36 hours - 25%54 hours - 12.5%64 hours - 6.125%82 hours - 3.0625%100 hours - 1.531%118 hours - 0.765%So in less than 5 days there is less than 1% left in the body. In real life the 18 hour half life is an average, and the rate of elimination may vary with concentration and other factors. But as rule of thumb we say that after 4 or 5 half lives it’s essentially out of the system in terms of whether it may still causing any affect and whether it may interact with other drugs.
Minocycline for acne?
Minocycline does work very well in clearing up acne, but it isn't something you want to be on long term. You do not want to go out in the sun while using it. It makes your skin sun sensitive and you can end up with a very blotchy complexion. Use a good sunscreen. Multivitamins and calcium supplements can make minocycline less effective if you take them too close together. And, looking at your avatar, you appear to be a male, but if you are a woman, you would not want to take it while nursing or pregnant. Other than these, Minocycline has a very good success rate for clearing acne, but while you are taking it you should try and find a more permanent solution to your acne problem.
Minocycline for back-acne?
the acne should go away in about two weeks sounds forever and not worth it but trust me it is, it does have side-effects but it is worth it because you dont need to worry about back acne anymore, do what the label says to do thats why they went to college for years, and Minocycline is for black heads, white heads ,and basically any small bacteria acne
If I take two doxycycline at 100mg a day for seven days, how long will it stay in my system and is it still treating me after the final dosage? If so, for how long?
It depens on conditions that may diminish or alter the absorption, metabolism or excretion of the drug by your systems.[1] If you have any problems or doubts, better talk to the doctor that prescibe it.Footnotes[1] Pharmacokinetics and pharmacodynamics of the tetracyclines including glycylcyclines
Why shouldn’t you like down for 10 minutes after you take an antibiotic (Clindamycin HCL, 300 MG)?
Clindamysin (and certain other antibiotics) cause increased production of stomach acids, and laying down increases risk of heart burn. These antibiotics can also be very abrasive to the esophagus and remaining upright helps to prevent this problem of pills getting 'stuck' to the esophagus on the way down.It's also why it's usually suggested that you have these pills with a tall glass of water.On a side note, you should follow the same advice after you have NSAIDs/Fosamax too.