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how long penicillin stay in your system

A 37-year-old member asked:
Dr. James Gagne
47 years experience Internal Medicine
About 24 hours : Penicillin is an antibiotic with a short half-life, about four hours. If you take 500 mg at noon, 250 mg is still there at 4 pm, 125 mg at 8 pm, 62 mg ... Read More
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A 54-year-old female asked:
Dr. Ayman Omar
Specializes in Neurology
Yes: I'm assuming you are talking about the tablet not the powder form. If so, the tablets are scored so yes you can cut it in half. Half of it is gone fro ... Read More
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A 37-year-old member asked:
Dr. Michael Palumbo
22 years experience Allergy and Immunology
5 hours: The half life of penicillin v is 30 minutes thus it is cleared in 5 hours.
A 43-year-old male asked:
Dr. Robert Killian
27 years experience General Practice
Penicillin Allergy: You can have sex now. There is no transfer of the penicillin in your semen.
A 41-year-old member asked:
Dr. Mitchell Blass
28 years experience Internal Medicine
Very short half life: In general Ampicillin and it's derivatives have a very short half life and if one stops taking the medicine, it will be out of ones system in a matter ... Read More
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A 40-year-old member asked:
Dr. Perumunda Sharma
47 years experience Emergency Medicine
Amoxicillin: The effects are gone in 24 hours.
A 41-year-old member asked:
Dr. Ajay Acharya
36 years experience Internal Medicine
24 hrs: 24 hrs for clinical consideration.
A 53-year-old member asked:
Dr. David Rosenfeld
26 years experience Pain Management
See below: Urine drug screens can detect it for up to a week. I assume you ask because it was not prescribed to you. It is very dangerous to take pain medicati ... Read More
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A 41-year-old female asked:
Dr. Michael Fisher
31 years experience Dermatology
Doxycycline: 99.9% of Doxycycline is removed from your system after 90 hours.
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A 38-year-old member asked:
Dr. Donald Jacobson
39 years experience Psychiatry
Methadone half-life: The half-life of Methadone is 15 to 60 hours. It takes five times the half-life to leave your system. Therefore it could take anywhere between 75 hou ... Read More
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A female asked:
Dr. Rafael Munne
39 years experience Psychiatry
Days: It is a long acting Benzodiazepine like Clonazepam and has many metabolites that can endure for days.
A 43-year-old member asked:
Dr. Michael Ein
47 years experience Infectious Disease
40 hours: The half life (time for elimination of half the drug) of Metronidazole or Flagyl is 8 hours. Total elimination occurs after 5 half lives from the las ... Read More
A 42-year-old member asked:
Dr. Marc Zimmermann
21 years experience Psychiatry
72 hours: The half life is 12 hours. It should be fully out of your system in 72 hours.
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A 40-year-old member asked:
Dr. Luis Villaplana
34 years experience Internal Medicine
MAY I ASK EXACTLY: Why are you asking this question? Be honest.
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A 46-year-old member asked:
Dr. Michael Ein
47 years experience Infectious Disease
40 hours: The half life (time for elimination of half the drug) of Metronidazole or Flagyl is 8 hours. Total elimination occurs after 5 half lives from the las ... Read More
A 53-year-old member asked:
Dr. Mark Reynolds
32 years experience Psychiatry
70 hours : Half life of Lorazepam is 14 hours. Five half-lives to clear. Figure about 70 hours to clear from your system.
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A 34-year-old female asked:
Dr. Shahid Rafique
43 years experience Internal Medicine
72 hours: Metabites of alpazolam (xanax) can be detected approximately 72-96 hours after the last dose. Some individuals metabolize it faster and it is cleared ... Read More
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A 54-year-old member asked:
Dr. Stuart Wasser
34 years experience Addiction Medicine
In urine: Five days. Withdrawal- weeks to months.
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A 51-year-old member asked:
Dr. David Rosenfeld
26 years experience Pain Management
See below : It depends on the formulation and delivery system but immediate release morphine gas a half time of 2-4 hours. Like all drugs it take 4 half lives to ... Read More
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A member asked:
Dr. David Rosenfeld
26 years experience Pain Management
See below: The half life is 4.5 hours. Based on that it should be out of your system in 18 hours.
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A 51-year-old female asked:
Dr. Michael Sokol
Specializes in Internal Medicine
The pharmacological: Effect is 24 hours but the biological effect may easily last 48 hours or rarely longer depending on a variety of factors.
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A 44-year-old member asked:
Dr. Ritesh Rathore
29 years experience Hematology and Oncology
Depends: A single standard dose of Adderall (dextroamphetamine and racemic amphetamine) is usually completely eliminated after 1 day; the half life is 10 hours ... Read More
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A 48-year-old member asked:
Dr. Brian Nichol
29 years experience Anesthesiology
varies: Typically metabolites of hydrocodone are present in urine from 3-7 days.
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