Medicine and First-Aid

Grow Your Own Penicillin


Penicillin – the one kind of antibiotic that everyone knows. It comes in many different sub-forms and can be administered orally, via injection and applied externally for many diseases and infections. This blog post will not concern penicillin that can be bought at a pharmacy, but rather penicillin that you can cultivate yourself in case of dire emergency, such as in the case of SHTF. We have personally grown penicillin quite a lot and have used it externally and internally for minor treatments to test the “home-grown” effectiveness – and taking into consideration that you have penicillin mould and not something else – it works just fine…although it is a bit more dilute that it’s pharmacy-bought equivalents. 

Now it’s time for a bit of a disclaimer from us – just because we use ourselves as test subjects for many of our medical knowledge does not mean you should necessarily do it as well just because we do it. We are assuming that everyone reading this is of sound mind and lucid reasoning.

Firstly, if possible, we recommend finding a good pharmacist that is willing to provide you with a variety of medicines for your stockpile – even without prescriptions. Such a person is very valuable. Personally, we have found ours, and have stockpiled quite a lot of important and life-saving medicines for in case the world decided to break. When you do this as well – it would be useless to you if you do not know how and when to administer them, so in addition to having the treatment, you need to know this as well. We will discuss these things at a later stage. We also highly suggest that you look into homeopathic remedies and treatments in addition to modern treatments, but we will discuss this at a later stage as well. Now, on to making your own penicillin.

Step 1: Cultivation
If you’re like us, you’ve probably grown penicillin mould by accident many times – it most commonly grows on bread and fruit…thus, this is what you will use. Take fruit or bread, put it in a plastic bag and place it somewhere out of the sun. The important thing here is to keep it out of direct sunlight. The moisture and/or the plastic bag will assist in creating humidity which in turn will make the penicillin grow faster. If you have tried using bread and nothing happened, it could be due to anti-fungal additives that the bakers used in it.

After a while (the process would be significantly faster if you live in a warm and humid area like us) you will see mould developing on the fruit or bread’s surface. Penicillin will start out as grey or white, then it turns blue, and finally (when it matures) it turns blue-green. It will also have a white outer ring around it. Penicillium mould produces penicillin when the mould-colony comes under stress or when it matures – in other words, it is at its most effective when it becomes blue-green. Here are a few examples. 

Be mindful though as some other moulds look like penicillin, such as aspergillus mould. The best and most effective way to tell the difference between the two is of course under a microscope.

Penicillin (left) has longer “stalks” at the end, but aspergillus (right) has a thick “bush” stemming from a bulb. Not all of us owns a microscope – so you will have to base your judgement on what it looks like. Aspergillus may be black (which would be a dead giveaway), yet it will always look “fuzzier” than penicillin – and penicillin would be more blue than aspergillus. Aspergillus is used for a few things, but only certain strains of it – it is deadly, so be very careful with this. Use the photos we have included as reference. Below are two photos of aspergillus.

Step 2: Sterilised Cultivation
If you’re under time pressure to get the penicillin, skip ahead to Step 3 – otherwise, if you want to have a cleaner set of penicillin at your disposal, do the following.

Firstly, sterilise a container and lid using a pressure cooker or by boiling it for about an hour. Then, take more fruit or bread to grow the new batch of penicillin – but this time either boil the fruit, or bake the bread. You can also use alcohol for the fruit. Next, place the fruit or bread in the sterilised container, and add a piece of the penicillin mould obtained through step 1 on top of it – and close the container. Allow a few days for it to grow and yet again, as before, keep it out of direct sunlight. This batch of penicillin is more pure than the first batch – yet the first batch will still work.

Step 3: Extracting and Using
Usually, to extract the good stuff from various sources, you would have to purify it through a number of processes (as seen with making essential oils from herbs). You can do this with the penicillin mould as well if you so choose by removing it from the fruit/bread, adding a weak acid (such as citric acid, cream of tartar or Vitamin C) to water and adding the mould to the mix. Then, filter it through anything fine and collect the liquid. There are other methods, yet this is the easiest. This liquid is a dilute version of penicillin.

Keep in mind though, that you don’t need to do the above at all if you choose not to for whatever reason. It will not impact the effectiveness. Other methods of making use of the penicillin mould is as follows:

– Simply scrape it off of the fruit/bread and eat it.

– Scrape it off and apply it directly to a wound.

– Make a tea from it by adding the moulded fruit/bread to luke warm water and letting it steep for a while – then drink it, apply it or soak a bandage in this liquid for use.

– When using the bandage method above, you can either use the bandage immediately, or you can place it in a sterile container and let the mould grow on it as well – as with the fruit/bread – before use. Make sure that both the bandage and container is sterile for this purpose.

10017961SmBottleWGlassDropperAmber_1You can also store this for a while (a few months), but we recommend using it as you make it. If you store it, store it in something apthat will protect it from sunlight.This isn’t all of the ways you can use it – we will leave the rest up to you.

Another alternate source of penicillin is in fish supplements containing penicillin (yes, it is the same penicillin found inScreenshot_2019-04-25-14-50-39 human medications). We have added a picture of a search, yet we will not discuss this in detail. Please note that some people are allergic to penicillin – know who in your family/survival group etc is allergic and seek alternate solutions for them.


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