Actions of Ofloxacine Merck in details
Pharmacokinetics: Drug concentrations in serum (in subjects with tympanostomy tubes and perforated tympanic membranes), in otorrhea and in mucosa of the middle ear (in subjects with perforated tympanic membranes) were determined following otic administration of Ofloxacine Merck solution. In two single-dose studies, mean Ofloxacine Merck serum concentrations were low in adult patients with tympanostomy tubes, with and without otorrhea, after otic administration of 0.3% solution [4.1 ng/mL (n=3) and 5.4 ng/mL (n=5), respectively]. In adults with perforated tympanic membranes, the maximum serum drug level of Ofloxacine Merck detected was 10 ng/mL after administration of a 0.3% solution. Ofloxacine Merck was detectable in the middle ear mucosa of some adult subjects with perforated tympanic membranes (11 out of 15 subjects). The variability of Ofloxacine Merck concentration in the middle ear mucosa was high. The concentrations ranged from 1.2-602 mcg/g after otic administration of a 0.3% solution. Ofloxacine Merck was present in high concentrations in otorrhea (389-2850 mcg/g, n=13) 30 min after otic administration of a 0.3% solution in subjects with chronic suppurative otitis media and perforated tympanic membranes. However, the measurement of Ofloxacine Merck in the otorrhea does not necessarily reflect the exposure of the middle ear to Ofloxacine Merck.
Microbiology: Ofloxacine Merck has in vitro activity against a wide range of gram-negative and gram-positive microorganisms. Ofloxacine Merck exerts its antibacterial activity by inhibiting DNA gyrase, a bacterial topoisomerase. DNA gyrase is an essential enzyme which controls DNA topology and assists in DNA replication, repair, deactivation and transcription. Cross-resistance has been observed between Ofloxacine Merck and other fluoroquinolones. There is generally no cross-resistance between Ofloxacine Merck and other classes of antibacterial agents eg, β-lactams or aminoglycosides.
Ofloxacine Merck has been shown to be active against most strains of the following microorganisms, both in vitro and clinically in otic infections :
Gram-Positive Aerobes: Staphylococcus aureus and Streptococcus pneumoniae.
Gram-Negative Aerobes: Haemophilus influenzae, Proteus mirabilis, Moraxella catarrhalis and Pseudomonas aeruginosa.
How should I take Ofloxacine Merck?
Take Ofloxacine Merck only as directed by your doctor. Do not take more of it, do not take it more often, and do not take it for a longer time than your doctor ordered.
Ofloxacine Merck comes with a Medication Guide. Read and follow the instructions carefully. Ask your doctor if you have any questions.
You may take Ofloxacine Merck with or without food.
Drink plenty of fluids while you are being treated with Ofloxacine Merck. Drinking extra water will help to prevent some unwanted effects of Ofloxacine Merck.
If you are also using antacids containing aluminum or magnesium (such as Maalox®, Mylanta®), multivitamins (with calcium, iron, or zinc), didanosine (Videx®), or sucralfate (Carafate®), take these medicines at least 2 hours before or 2 hours after you take Ofloxacine Merck. These medicines may keep Ofloxacine Merck from working properly.
Keep using Ofloxacine Merck for the full treatment time, even if you feel better after the first few doses. Your infection may not clear up if you stop using the medicine too soon.
Dosing
The dose of Ofloxacine Merck will be different for different patients. Follow your doctor's orders or the directions on the label. The following information includes only the average doses of Ofloxacine Merck. If your dose is different, do not change it unless your doctor tells you to do so.
The amount of medicine that you take depends on the strength of the medicine. Also, the number of doses you take each day, the time allowed between doses, and the length of time you take the medicine depend on the medical problem for which you are using the medicine.
- For oral dosage form (tablets):
- For treatment of infection:
- Adults—200 to 400 milligrams (mg) every twelve hours for 3 to 14 days, depending on the medical problem being treated. Prostatitis is usually treated for six weeks. Gonorrhea is usually treated with a single oral dose of 400 mg.
- Children—Use and dose must be determined by your doctor.
- For treatment of infection:
Missed Dose
If you miss a dose of Ofloxacine Merck, take it as soon as possible. However, if it is almost time for your next dose, skip the missed dose and go back to your regular dosing schedule. Do not double doses.
Storage
Store the medicine in a closed container at room temperature, away from heat, moisture, and direct light. Keep from freezing.
Keep out of the reach of children.
Do not keep outdated medicine or medicine no longer needed.
Ask your healthcare professional how you should dispose of any medicine you do not use.
Ofloxacine Merck administration
Use Ofloxacine Merck otic exactly as directed by your doctor. If you do not understand these instructions, ask your pharmacist, nurse, or doctor to explain them to you.
Do not use this medication in the eyes or take it by mouth. Ofloxacine Merck otic is intended for use in the ears only.
In general, Ofloxacine Merck otic should be used as follows:
- Warm the drops slightly by holding the bottle in the hands for 1 or 2 minutes. Administration of cold drops into the ear may cause dizziness.
- Have another person administer the drops whenever possible. Have the affected person lie on their side or tilt the ear up to make administering a drop easier.
- Gently shake the drops just before administration.
- For adults, gently hold the earlobe up and back. For children, gently hold the earlobe down and back. This will allow the drops to run into the ear canal. Carefully instill the prescribed number of drops in the first ear.
- Keep the ear tilted for at least 5 minutes to allow the medication to penetrate the ear.
- If the patient being treated has ear tubes, the doctor may recommend gently pressing the tragus (part of the ear in front of the opening of the ear canal) four to five times in a pumping motion after administration of the drops. This may allow the drops to pass through the tubes into the middle ear. Follow the doctor's instructions.
- Repeat the process in the other ear if prescribed.
Ofloxacine Merck ear drops are usually used twice a day, about 12 hours apart. Follow your doctor's instructions.
Use all of the medication that has been prescribed. Symptoms may begin to improve before the condition is completely treated. If you do not use all of the medication prescribed, the condition could return or worsen.
It is important to use Ofloxacine Merck otic regularly to get the most benefit.
Notify your doctor if the condition does not improve or appears to worsen.
Avoid getting water inside of the affected ear(s) during treatment with Ofloxacine Merck. Care should be used while bathing, and swimming may not be recommended. Talk to your healthcare provider.
Store Ofloxacine Merck otic at room temperature, away from moisture, heat, and direct light. Keep the bottle properly capped.
Ofloxacine Merck pharmacology
Pharmacokinetics:
Serum, urine and tear concentrations of Ofloxacine Merck were measured in 30 healthy women at various time points during a ten-day course of treatment with Ofloxacine Merck Ophthalmic Solution. The mean serum Ofloxacine Merck concentration ranged from 0.4 ng/mL to 1.9 ng/mL. Maximum Ofloxacine Merck concentration increased from 1.1 ng/mL on day one to 1.9 ng/mL on day 11 after QID dosing for 10 1/2 days. Maximum serum Ofloxacine Merck concentrations after ten days of topical ophthalmic dosing were more than 1000 times lower than those reported after standard oral doses of Ofloxacine Merck.
Tear Ofloxacine Merck concentrations ranged from 5.7 to 31 mcg/g during the 40 minute period following the last dose on day 11. Mean tear concentration measured four hours after topical ophthalmic dosing was 9.2 mcg/g.
Corneal tissue concentrations of 4.4 mcg/mL were observed four hours after beginning topical ocular application of two drops of Ofloxacine Merck Ophthalmic Solution every 30 minutes. Ofloxacine Merck was excreted in the urine primarily unmodified.
Microbiology:
Ofloxacine Merck has in vitro activity against a broad range of gram-positive and gram-negative aerobic and anaerobic bacteria. Ofloxacine Merck is bactericidal at concentrations equal to or slightly greater than inhibitory concentrations. Ofloxacine Merck is thought to exert a bactericidal effect on susceptible bacterial cells by inhibiting DNA gyrase, an essential bacterial enzyme which is a critical catalyst in the duplication, transcription, and repair of bacterial DNA.
Cross-resistance has been observed between Ofloxacine Merck and other fluoroquinolones. There is generally no cross-resistance between Ofloxacine Merck and other classes of antibacterial agents such as beta-lactams or aminoglycosides.
Ofloxacine Merck has been shown to be active against most strains of the following organisms both in vitro and clinically, in conjunctival and/or corneal ulcer infections as described in the section.
*Efficasy for this organism was studied in fewer than 10 infection
The safety and effectiveness of Ofloxacine Merck Ophthalmic Solution in treating ophthalmologic infections due to the following organisms have not been established in adequate and well-controlled clinical trials. Ofloxacine Merck Ophthalmic Solution has been shown to be active in vitro against most strains of these organisms but the clinical significance in ophthalmologic infections is unknown.
Clinical Studies:
Conjunctivitis: In a randomized, double-masked, multicenter clinical trial, Ofloxacine Merck Ophthalmic Solution was superior to its vehicle after 2 days of treatment in patients with conjunctivitis and positive conjunctival cultures. Clinical outcomes for the trial demonstrated a clinical improvement rate of 86% (54/63) for the Ofloxacine Merck treated group versus 72% (48/67) for the placebo treated group after 2 days of therapy. Microbiological outcomes for the same clinical trial demonstrated an eradication rate for causative pathogens of 65% (41/63) for the Ofloxacine Merck treated group versus 25% (17/67) for the vehicle treated group after 2 days of therapy. Please note that microbiologic eradication does not always correlate with clinical outcome in anti-infective trials.
Corneal Ulcers: In a randomized, double-masked, multi-center clinical trial of 140 subjects with positive cultures, Ofloxacine Merck Ophthalmic Solution treated subjects had an overall clinical success rate (complete reepithelialization and no progression of the infiltrate for two consecutive visits) of 82% (61/74) compared to 80% (53/66) for the fortified antibiotic group, consisting of 1.5% tobramycin and 10% cefazolin solutions. The median time to clinical success was 11 days for the Ofloxacine Merck treated group and 10 days for the fortified treatment group.
References
- DailyMed. "OFLOXACIN: DailyMed provides trustworthy information about marketed drugs in the United States. DailyMed is the official provider of FDA label information (package inserts).". https://dailymed.nlm.nih.gov/dailyme... (accessed September 17, 2018).
- EPA DSStox. "Ofloxacin: DSSTox provides a high quality public chemistry resource for supporting improved predictive toxicology.". https://comptox.epa.gov/dashboard/ds... (accessed September 17, 2018).
Reviews
The results of a survey conducted on ndrugs.com for Ofloxacine Merck are given in detail below. The results of the survey conducted are based on the impressions and views of the website users and consumers taking Ofloxacine Merck. We implore you to kindly base your medical condition or therapeutic choices on the result or test conducted by a physician or licensed medical practitioners.User reports
Consumer reported administration
No survey data has been collected yetConsumer reviews
There are no reviews yet. Be the first to write one! |
Information checked by Dr. Sachin Kumar, MD Pharmacology
