Repackage by sealing whole original bottles inside a barrier bag, vacuum or Mylar, with a desiccant packet and, if you use one, an oxygen absorber, rather than by pouring tablets into new containers. The original label carries the drug name, strength and expiry date, and losing it is the most dangerous thing repackaging can do. If you must decant, label each container with the drug, the strength per tablet, the quantity, the original expiry date and the repackaging date.
Moisture and air barriers slow decay, provided the original label stays with the drug.
The Barrier Goes Around The Bottle
Moisture and oxygen are two of the four causes of decay. The safest barrier wraps the sealed original bottle without touching what is inside. That keeps the label, the lot number and the expiry date with the drug.
What To Use
- Desiccant packets (silica gel). Salvage them from shoe boxes, electronics packaging, vitamin bottles and jerky packs. One or two packets per bottle are used in the barrier bag or beside the bottle. They absorb moisture. Never eat them, and keep them from children. For more on desiccants see Desiccants.
- Vacuum sealing. Seal the whole bottle inside a vacuum bag. This removes air and adds a moisture barrier. Vacuum pressure can crush soft capsules and blister packs, so keep tablets in their rigid bottle.
- Mylar bags with oxygen absorbers. Common in food storage. Put the bottle in the bag with an oxygen absorber and a desiccant packet, seal it, and keep the bag in a cool, dark place. The absorber is a sealed sachet that must not touch or be mixed with the medicine.
Method: Repackage Safely
Step 1: Keep the bottle closed and intact. Do not decant unless you must.
Step 2: Group by drug. One drug per bag, so a mix-up cannot happen.
Step 3: Add the desiccant and, if used, the absorber. Beside the bottle, not inside it.
Step 4: Seal and label the bag. Write on the bag the drug name, strength per unit, quantity, original expiry date and the date you sealed it.
Step 5: Store the sealed bag cool and dark. See Optimal Storage Conditions.
Common Mistakes
- Pouring several drugs into one jar. Unlabelled pills cannot be told apart, and a wrong tablet can kill.
- Adding cotton to fill the air space. Manufacturers’ cotton plugs are for transport, and pharmacists commonly advise removing them after opening because cotton can hold moisture.
- Letting the absorber touch tablets. Keep it separate.
Safety
Decanted, unlabelled tablets are unidentifiable and can be fatal
Once tablets leave their original container, there is no reliable way to tell one white tablet from another, and the wrong drug or the wrong strength can kill; acetaminophen (paracetamol) in particular harms silently for a day before it causes liver failure. Label anything you must decant, do not rely on memory, and treat any unlabelled loose tablet as unusable.
What’s Next
- Learn next: Critical Drugs to Prioritize — what to put in the store
- Combine with: Optimal Storage Conditions — where the sealed bags go