Antibiotics (also called antibacterials) are drugs used to treat bacterial infections. They work by slowing down the growth of bacteria that cause contagious diseases. Antibiotics should not be misused as this may result in the emergence of antibacterial-resistant bacteria.

11,840 Questions
Birth Control
Birth Control Pill
Drug Interactions

Do antibiotics affect the birth control pill?

Study after study shows that there are no clinically significant drug interactions* between the vast majority of antibiotics and the birth control pill. Anecdotal evidence from health care providers has led some to recommend using a backup method of birth control for a week after using antibiotics. Long-term use (as for acne) does not increase the risk of pregnancy. There are a few antibiotics, such as rifampin and griseofulvin and some HIV medications, that do interact. The safest approach is to check with your health care provider or pharmacist for advice specific to your situation.

*While some antibiotics may slightly change the absorption of estrogen in the gut, these changes are not enough to change how well the birth control pill works, with the exceptions noted above.

Taken from the newsletter: "Pharmacist's Letter" November 11, 2002


Women have been warned for decades to use backup contraception when taking oral contraceptives and antibiotics together.

This all started back in the '70s when a few women on oral contraceptives took rifampin and then got pregnant.

Additional anecdotal reports started popping up, suggesting that other antibiotics might be related to unwanted pregnancies in women taking oral contraceptives.

One theory was that antibiotics killed gut bacteria, which are involved in estrogen absorption.

Researchers later discovered that rifampin and griseofulvin actually increase the metabolism of oral contraceptives, making them less effective.

But the evidence for other antibiotics is shaky.

In fact, oral contraceptive levels are not DECREASED by most antibiotics...tetracycline, doxycycline, ampicillin, quinolones, and metronidazole.

Oral contraceptive levels are actually INCREASED by some antibiotics...erythromycin...clarithromycin...and trimethoprim-sulfamethoxazole.

There's growing evidence that most women taking antibiotics with oral contraceptives do NOT have an increased risk of getting pregnant.

But most package inserts still warn that another form of contraception is needed when starting antibiotics.

Explain to women taking oral contraceptives that there can be up to a 3% failure rate, regardless of antibiotic use.

A small number of women might be predisposed to a higher failure rate due to genetic metabolic variations...but it's difficult to determine who these women are.

To be on the safe side, tell women to continue using backup contraception during the entire course of antibiotics and for 7 days after.

Explain that sickness or antibiotic side effects such as diarrhea or vomiting can increase oral contraceptive failure.

Birth Control
Birth Control Pill
Medication and Drugs

Does Amoxicillin affect the Birth Control Pill?

Amoxicillin and other antibiotics can make the BCPs less effective. Most suggest a barrier method like condoms.

Because our bodies are all so different there is no real way to measure this. What is enough to cause one woman to get pregnant may not have an effect on another.

Microorganisms in your gut can alter the drug, it gets sent back to the liver, which changes it back, and the cycle starts over meanwhile the drug is effective. If you take antibiotics you have the potential of killing those little helpful organisms, and enhance the clearance of the drug from the body.

There is insufficient evidence to say that amoxicillin negatively affects your birth control pills. The topic is debatable (though most experts believe that it does not) so most doctors err on the side of caution and instruct their patients to use other means of contraception.

In simple English there is no evidence that amoxicillin, tetracycline, penicillin or other broad spectrum antibiotics decrease the effectiveness of oral contraceptives. There are a few drugs that can have a marked effect on contraceptives so always ask your doctor or pharmacist when you begin taking a new prescription along with contraceptives.


Are antibiotics used to treat chickenpox?

Because chickenpox is a viral disease, antibiotics are ineffective against it. Your doctor will give you antibiotics if secondary infection has occurred -- that is, if the chickenpox bumps show signs of infection with bacteria.

Antivirals can be used to treat chickenpox in severe cases, but do not cure the infection. The virus remains in your body for life.


What is the treatment for STDs?

STD treatments vary depending on the conditions you have or are experiencing. If you name the STD I can tell you what the doctor will most likely prescribe. Each STD is normally treated with a different drug; whether it is from a bacteria or a virus. TDs, if a bacteria, are treated with antibiotics; if viral they are treated with antiviral medications.

STDs are treated with antibiotics or antiviral medications.

STDs are treated with prescription medications.

The STIs not caused by a virus are all treated with a different antibiotic. Typical antibiotics are zithromax, doxycycline, ciprofloxacin, flagyl, and penicillin G benzathine. Many of these are used for treatments other than STIs.

Drugs used to treat bacterial STDs are zithromax, doxycycline, ciprofloxacin, flagyl, and penicillin G.

You cannot just 'take medicine' to cure an STD, there are many STDs each of which require specific medication. You need to go to a sexual health clinic (look in Yellow Pages) and get a specific diagnosis, then they will prescribe the correct medication.

What medication you take for the STD depends on what you are infected with. Each STD has a recommended medication per CDC requirements.

STD'S can only be treated for a short period of time even tho your getting treated you still have the disease and also it cost a lonesome of money to pay for treatment, eventually the treatment is going to stop working.


Depends on the sti. Some are treated and or cured with antibiotics. Viral stds like herpes are typically managed with antiviral medication.

Depends. if its a virus, then they will never go away. but if the STD is a bacteria, then you have to go on antibiotics.

For bacterial, parasitic, and fungal infections antibiotics can be taken to cure the STD. Viral STDs can not be cured.

There are many different sexually transmitted diseases, and the treatment is not the same for all of them. Syphilis is treated with penicillin.

Depending on the STD, they are treated with antibiotics or antiviral medications.

The depends on the infection, the disease caused by the infection (e.g. urethritis versus PID or early syphilis versus neurological system infection), and the medication.

A doctor will prescribe antibiotics or antiviral medications for STD infections.

Go to the doctor.

Depending on the STD and if it is either bacterial or viral there is different treatment. Bacterial infections can be treated with antibiotics and viral treatments either can never be treated like herpes or HIV or they require a an antiviral shot.

Prescription medications are treatments for STDs.

Each STI has a different medication to take for it.

Not all STDs are curable. AIDS patients take AZT, which slow the effects of HIV/AIDS. People with herpes take Valtrex or similar treatments, to lessen the effects of Herpes. Curable STDs, just as chlamydia and gonorrhea, are typically treated with antibiotics such as penicillin.

Some STDs are caused by bacteria, some are caused by viruses, some are caused by fungi, some are even caused by arthropods. Since proper treatment relies on knowing WHAT needs to be treated, you should see a physician, and then take whichever antibiotic (the brand is more or less irrelevant, it's the actual chemical that matters) the physician prescribes for your particular disorder.

There are different medication for different STD it's always best not to try to self medicate yourself seek a doctor to be evaluated and treated so you can have a peace of mind that you will get the best possible results.

various. Depends on the std.

There is not one all encompassing antibiotic to take for all STIs (STDs). The antibiotic is bacteria specific.

That would depend on the STD in question (antibiotics do not cure viral or fungal STDs). Also remember that many bacterial diseases are evolving resistance to antibiotics, we are not long away from having to treat infections using just pre-antibiotic weapons.

Some names are Cipro, Zithromax, Doxycycline, Flagyl, and others. There are several dozen types, most of which are used for the specific type of infection (each STD is treated with a different medication).

Depends on the STD (or STi as they tend to be called now) and also which strain of infection.

In some cases, more than one antibiotic is specified, again this will depend on the infection and to some extend even what part of the world - as different strains have different resistance to modern antibiotics.

Some STIs of course are viral and not bacterial - herpes, HIV etc, HPV - so antibiotics are of no direct use at all - though in the case of HIV, they may be useful in treating opportunistic infections caused in part by a weakened immune system. For some of these, antivirals like acyclovir can be useful to treat (but not cure) some infections - particularly herpes.

Can you be more specific, WHICH STi are you thinking of in particular - otherwise if you mean "all of them" the list is basically going to include pretty much ALL antibiotics.

An antibacterial wouldn't help with an STD. If you mean which Antibiotic, that would depend on which STD. If you have an STD, suck it up & go see a Dr, the emergency room or the local free health clinic. They are sworn to secrecy & even if you are under age no one will know, it could save your life.

You will need to obtain a prescription from your doctor to have it be the correct one to take, as well as the right quantity.

Only a qualified physician can administer the correct treatments. Testing must be done to verify the disease involved and a treatment started.

There are a lot of different types of antibiotics that can be used to treat stds that are caused by bacteria. Viral stds like herpes and genital warts can't be cured.

You will need to go to a doctor for treatment of STDs. There is not over the counter drugs that will treat STDs.

You should call your family doctor, or one from the phone book if you feel you might be embarrassed to share these concerns with your regular doctor. If you are a college person, many colleges have health clinics and regularly do STD screenings. If you are a high school person then you can ask your guidance counselor to help you find the right people. Most towns also have a public health nurse. You can call 411 to get that number. The usually offer planned parenthood information and often will provide condoms for free. The public health nurse can take some tests to do the screening. If you are a minor they may require a parents OK in order to do the tests, but before panicking over that one, at least give them a call to find out. See the link below for more information on STD's.

It can depend on which specific type of STD you are diagnosed with. You must be more specific. Different drugs treat different diseases.

You can receive treatment for an STD at Your Regular Medical Practitioner, Local Health Departments, or Public Hospitals.

The medication that is needed depends on what STD you are infected with.

It depends on what disease is bien treated Intiboitics are used for most of them.

Most STDs are treated with antibiotics, usually penicillin.

STDs are serious illnesses that require treatment. Some STDs, like AIDS, cannot be cured and are deadly.

There are many sexually communicable diseases that can be caught by sexual contact. Some medicines will fix some, other medicines will fix others.

Proper diagnosis is needed to ensure the right medication is prescribed.

Many people do not feel comfortable in going to their family doctor for these types of ailments. That's fine, as most cities have sexual health clinics attached to public hospitals. The doctors and nurses in these establishments are experts in their fields and can diagnose what particular nasty you have and prescribe the relevant medication. Different bugs need different medications. And relax, the staff have seen literally thousands of penises, vaginas, and bums, so whatever you have won't surprise them. Like a heart surgeon, only a little further south...

Remember that there are some nasties that can't be cured with tablets or an injection, like herpes, HIV, and warts. All the more reason to practise safe sex and get regular check ups.

Yes and no. Depends on the disease that you have. There are no get rid of Aids pills, or Herpes pills although herpes can be controlled by creams. The only two STDS that I know of that can be treated are syfilis and gonerrea, and you might want to do a spell check on sysfilis.

you can treat sti by using cream,medication an lots of others stuff etc

you need 2 make a hotpress which means get a wash cloth and wet it as hot as possible or as hot as you can stand it and press it against your eye for bout 10 min do this for weeks until your sti is gone if this does not help see an eye doctor

A carrier can get cured of a std.

It all depends on the kind of STD you have. If you think you have an STD, you should see a doctor and they can prescribe you something. You should go even if you feel embarrassed!

Pregnancy Health and Safety (Prenatal Care)
Medication and Drugs

Is it safe to take antibiotics while pregnant?

There are many drugs, that fall under the category of antibiotics. Some of them are safe during the pregnancy, while others are not. Your gynaecologist knows about the same. You are not supposed to take drugs of your own during pregnancy. Antibiotics are the class of drugs that must be prescribed to you by your doctor. You are requested to tell your doctor that you are pregnant, specially in the early months of pregnancy. Next time you go to the doctor, mention the same again. Do not presume that she or he knows the fact.

Medication and Drugs
Drug Interactions

Can you take vicodin while taking azithromycin?

Yes you can. Vicodin is a combination drug of Tylenol and hydrocodone which is a mild narcotic. The azithromycin is an antibiotic. There are no known drug interactions between the two.

Medication and Drugs

Can ciprofloxacin and doxycycline be used together?

I am on both Cipro and Doxy at the same time. I am allergic to Penicillin and I am having trouble fighting off a nasty Pasteurella infection in my hand after an animal bite. So yes, you can use them together. The only side effect I've had is increased urination and a touch of the blues.

Cold and Flu
Medication and Drugs

Does penicillin work on colds?

No. Penicillin and other antibiotics are only made for treating (or sometimes preventing) bacterial infections and have no effect on viral infections, such as colds and flu. You waste your money to take these for a cold unless the doctor is prescribing them for a secondary bacterial infection that you have along with the cold. They may seem to be making you feel better, but often that is just that by the time you give up and go to the doctor and ask for antibiotics, it is usually around 7 to 10 days from the start of symptoms, and that is around the same time your body usually can get rid of the viral infection through the immune system actions. The timing only makes it seem like the antibiotics did something to help. They don't.


Can you take melatonin while on antibiotics?

Ask you Doc or pharmacist. I wouldn't , as many anti-biotics make people drowsy by themselves.

Medication and Drugs
Drug Interactions

Can you take amoxicillin and Doxycycline same time?

Yes you can.. When I had tonsillitis.. they gave me 500 mg amoxicllian pills.. take 2 pills, 3x daily. And 100mg doxycycline pills, one pill 2x daily.

Medication and Drugs

Can cats take penicillin g benzathine?

Pen BP-48 (each ml - 150,000 units Penicillin G. Benzathine and 150,000 units Penicillin G. Procaine) Typically used for fighting baterial infections.

For Dogs: 1 cc per 20 pounds every 48 hrs. subcutaneously

Generally this antibiotic is not recommended for cats.

Unless you have years of experience treating farm animals you should always Consult a Licensed Veterinarian before administering drugs to animals.

Remember that administering drugs to farm animals is different than administering drugs to a small animal like a dog or cat etc. The concentration of the medication for large animals is much greater than for small animals like dogs and cats and could kill a small animal.

Medication and Drugs
Drug Side Effects

What are long-term effects of penicillin?

Penicillin can give you Abdominal Pain, bone and joint pain, Bloating, Chest pain and weakness.

Theres more but I really cant think of them


What are diet restrictions while on antibiotics?

Some antibiotics you must not ingest alcohol whilst taking them -i.e during the course of the antibiotics. However specific dietary restrictions are not necessary. Sometimes eating live natural yoghurt is encouraged since using antibiotics can result in oral thrush - the live yoghurt is supposed to help prevent this.

Medication and Drugs

Why don't antibiotics work against fungal diseases?

Quite a few. One of the most common is fluconazole. Others include ketoconazole, itraconazole, clotrimazole, miconazole, nystatin, and terbinafine. The are often considered antifungals rather than antibiotics though. Some are available for topical use and some are oral medications.

S - RPh


Can doxycycline cover up THC?

Doxycycline is an antibiotic, why would it? No.

Medication and Drugs

Can you take vicodin while taking Bactrim DS?

Yes, it may cause a little more dizziness, but make sure you stay hydrated and eat well while taking both.

Conditions and Diseases
Medication and Drugs
Cold Sores

Can amoxicillin help a fever blister?

Amoxicillin won't help a fever blister.

Medication and Drugs
Civil Lawsuits

Is there a class action lawsuit for Avelox?

There are individual lawsuits alleging personal injuries for side-effects from Avelox. I do not see an Avelox class action (yet). I suggest you contact a plaintiff class action attorney for further advice and information.

Good luck.

Medication and Drugs
Medication and Alcohol Interactions

Can you drink wine when taking apo-clindamycin?

No! It not advisable to drink alcohol of any kind with any type of antibiotic.

Medication and Drugs
Medication and Alcohol Interactions

Can you drink alcohol while taking Clindamycin?

Yes, you can drink alcohol while taking Clindamycin. No harmful interactions with alcohol are listed online on or As always drink responsibly, and ask this question of your doctor if you can.

Medication and Drugs

Can you take Flucloxacillin and Penicillin at the same time?

can you take sulfameth trimethoprim and clindamycin at same time.

Drug Safety

Can you snort minocycline?

You should not be "snorting" anything. It is a dangerous thing, and can lead to an unhealthy addiction. I am positive that nothing good will come of it. Minocycline may be a helpful treatment as an antibiotic, but nothing is safe when "snorting".

Conditions and Diseases
Medication and Drugs

Are antibiotics used to combat viral disease?

No, antibiotics won't kill viruses, they only work on bacterial infections. You need an antiviral for a viral infection.

Medication and Drugs

Can you sell penicillin?

You can sell it if you have a pharmacy license.


Does bactrim cure syphilis?

probably it could help but it doesn't cure this prevent the spread of bacteria


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