Storing and travelling with medication

There is no general rule for storing injectable medication, and the most useful thing this page can do is show you why. Five labels are transcribed in the first table and they do not agree: one testosterone product must be kept at room temperature and specifically must not be refrigerated, while a GLP-1 pen from the same bag must be refrigerated until first use. Two GLP-1 products of the same class give different in-use windows, 21 days and 56. The bacteriostatic water states no post-opening period at all. Pack by reading each label, not by applying a habit learned from a different product.

The travel half divides into two questions that get conflated constantly. Getting through an airport checkpoint is a screening question and TSA answers it in two sentences — medically necessary liquids above the usual limit are allowed in a carry-on, and are removed to be screened separately. Crossing a border with a controlled substance is a legal question, and testosterone is a Schedule III controlled substance by its own label. That one is answered by a federal regulation rather than by anybody’s policy page, and the regulation says something most travel advice gets backwards.

What this page does not do is guess. Whether TSA requires a prescription label rather than recommending one, whether syringes may be carried, how long a cool bag holds temperature, and what any other country’s customs authority requires are four questions we could not source, and all four are in the ledger at the foot of the page rather than answered with something plausible.

What this page does not cover

These live elsewhere on the site and are not restated here.

• Peptide storage and beyond-use dates

  The clock after a lyophilised product has been reconstituted: what six approved labels state, why they disagree by more than eightfold, and why no beyond-use date exists for an unapproved compound. This page covers unopened storage and transit, not reconstituted solutions.

• Bacteriostatic water mixing chart

  Everything about the diluent itself — benzyl alcohol per draw, the two preservative strengths, the neonatal contraindication, and the fact that no bacteriostatic water label states a discard date after puncture.

• How to reconstitute a peptide

  The mixing procedure and what to do when it goes wrong. This page picks up where that one ends: the sealed product before you open it, and the bag it travels in.

• How to inject testosterone

  Injection technique and sharps disposal, including what FDA asks of a sharps container and when to deal with a full one. Disposal while travelling is not covered here because we could not source it.

• Vial duration calculator

  How long a vial lasts at a given dose and interval — the arithmetic behind how much you actually need to pack, which this page does not compute.

The procedure

1. 1

   Find your own product’s storage line before you find anyone’s advice

   Every injectable in this area carries a Storage and Handling section and they do not say the same thing. Testosterone cypionate is the simplest case in the table: controlled room temperature, protected from light, and no refrigeration anywhere in the instruction. Read your own, because a rule learned from the product you were on last year may be the opposite of the rule for the one you are on now.

   FDA label

   “Store at 20° to 25°C (68° to 77°F) [see USP Controlled Room Temperature]. Protect from light.”

   DEPO-Testosterone (testosterone cypionate injection, USP) — FDA label, Pharmacia & Upjohn, ANDA085635, via DailyMed. Storage and Handling, the crystal-redissolving instruction, and the Controlled Substance section stating Schedule III.
2. 2

   Check whether your product forbids the fridge

   This is the instruction most likely to be broken by someone being careful. A reflex that cold storage is safer is wrong for at least one testosterone product on the US market, whose label prohibits it in as many words and adds the positive instruction to use it at room temperature. If you are carrying more than one injectable, this is the line that decides whether they can share a cool bag — and for a man on testosterone and a GLP-1, they cannot.

   FDA label

   “Do Not refrigerate or freeze. Use at room temperature.”

   XYOSTED (testosterone enanthate) injection — FDA prescribing information, Antares Pharma, Inc., via DailyMed. The one product in this table whose label prohibits refrigeration: "Do Not refrigerate or freeze. Use at room temperature."
3. 3

   For anything with an in-use window, write down when the clock started

   A refrigerated pen has two different storage regimes and the second one is time-limited from first use rather than from when you took it out of the fridge. The labelled windows differ between products in the same class — 56 days for one, 21 for another — so the figure has to come from your own carton. The label’s own advice is worth copying: write the disposal date on your calendar, because a pen with medicine left in it looks exactly like a pen that is still good.

   FDA label

   “After first use of the OZEMPIC pen, the pen can be stored for 56 days at controlled room temperature 15°C to 30°C (59°F to 86°F) or in a refrigerator 2°C to 8°C (36°F to 46°F). Do not freeze.”

   OZEMPIC (semaglutide) injection — FDA prescribing information, Novo Nordisk, via DailyMed. Section 16, Storage and Handling: refrigerated before first use, 56 days in use, do not freeze, keep in the original carton until administration.
4. 4

   Keep it in the carton, and keep the carton

   The carton is doing three jobs at once and two of them are easy to miss. It protects from light, which several labels require explicitly. It carries the lot number and expiry, which is the only way to identify a product that has been recalled. And for a controlled substance crossing a border it is part of the legal requirement, because the regulation asks for the original dispensed container rather than for a pill organiser or a spare vial box.

   FDA label

   “Store MOUNJARO in the original carton to protect from light.”

   MOUNJARO (tirzepatide) injection — FDA prescribing information, Eli Lilly and Company, via DailyMed. Storage and Handling: refrigerated, 21 days unrefrigerated for the single-dose presentations, original carton, and the instruction not to use it if frozen.
5. 5

   Never let it freeze, and do not use it if it has

   The instruction is not a caution and it is not about efficacy shading off gradually — several labels say do not use it, full stop, if it has been frozen. This matters more in transit than at home: an aircraft hold is not temperature controlled to room temperature, a car boot in winter is not either, and a cool bag packed against a frozen block can take a pen below zero. If you cannot be certain it stayed above freezing, the labelled answer is to discard it rather than to inspect it.

   FDA label

   “Do not freeze MOUNJARO. Do not use MOUNJARO if frozen.”

   MOUNJARO (tirzepatide) injection — FDA prescribing information, Eli Lilly and Company, via DailyMed. Storage and Handling: refrigerated, 21 days unrefrigerated for the single-dose presentations, original carton, and the instruction not to use it if frozen.
6. 6

   At an airport, put it in the carry-on and expect it screened separately

   TSA’s own FAQ settles the two questions people arrive with. Medically necessary liquids and medications are permitted in a carry-on bag above the ordinary 3.4 ounce limit, and the handling instruction is to take them out of the bag so they can be screened on their own. That is the whole of the rule as TSA states it — there is no quantity ceiling given, no requirement to declare in advance, and no form. The practical reasons to carry rather than check are separate and are about temperature and loss rather than about rules.

   Public-health guidance

   “You may bring medically necessary liquids, medications and creams in excess of 3.4 ounces or 100 milliliters in your carry-on bag. Remove them from your carry-on bag to be screened separately from the rest of your belongings.”

   Transportation Security Administration — Frequently Asked Questions, travelling with medication. "All passenger items must undergo security screening. It is recommended that medication be clearly labeled to facilitate the screening process." and the medically-necessary-liquids allowance above 3.4 ounces.
7. 7

   Label it, and understand that TSA recommends rather than requires

   The distinction is worth getting right because it is reported wrongly everywhere. TSA states that it is recommended that medication be clearly labeled to facilitate the screening process. Recommended. We could not find a TSA statement making a prescription label or a doctor’s letter a requirement for a domestic flight, and this page will not manufacture one. Keeping the dispensed label on is nonetheless free, it speeds the screening it exists to facilitate, and — separately from TSA — it is part of the federal requirement if a border is involved.

   Public-health guidance

   “All passenger items must undergo security screening. It is recommended that medication be clearly labeled to facilitate the screening process.”

   Transportation Security Administration — Frequently Asked Questions, travelling with medication. "All passenger items must undergo security screening. It is recommended that medication be clearly labeled to facilitate the screening process." and the medically-necessary-liquids allowance above 3.4 ounces.
8. 8

   If it is a controlled substance and a border is involved, the rule changes entirely

   Testosterone is a Schedule III controlled substance, and its own labels say so rather than leaving it to be inferred. That moves the question out of TSA’s hands and into a federal regulation, which permits an individual to enter or leave the United States with a substance in schedules II to V that was lawfully obtained for personal medical use — provided two conditions are met. Both are in the next two steps and neither is onerous, but neither is optional either.

   FDA label

   “DEPO-Testosterone Injection contains testosterone, a Schedule III controlled substance in the Controlled Substances Act.”

   DEPO-Testosterone (testosterone cypionate injection, USP) — FDA label, Pharmacia & Upjohn, ANDA085635, via DailyMed. Storage and Handling, the crystal-redissolving instruction, and the Controlled Substance section stating Schedule III.
9. 9

   Carry it in the container it was dispensed in, and declare it

   The first condition is the container: the regulation asks for the original container in which the substance was dispensed to you, which is one more reason not to decant a vial into something smaller or to travel with loose ampoules. The second is a declaration to a customs officer, stating that it is for your personal use and giving either the name and schedule as they appear on the container or the dispensing pharmacy’s name and address and the prescription number. Neither condition requires anything you do not already have if you kept the packaging.

   Public-health guidance

   “The controlled substance is in the original container in which it was dispensed to the individual”

   21 CFR 1301.26 — Exemptions from import or export requirements for personal medical use, via the electronic Code of Federal Regulations. Paragraphs (a), (b) and (c), including the sentence excluding US-dispensed prescriptions from the 50-dosage-unit ceiling.
10. 10

    Know the 50-dosage-unit rule, and know when it does not apply to you

    This is the figure every travel article repeats and almost none of them finishes the paragraph. The ceiling is real: a United States resident may import no more than 50 dosage units combined of controlled substances obtained abroad for personal medical use. The very next sentence of the same paragraph removes most readers from its scope, because it does not apply to controlled substances lawfully obtained in the United States on a prescription from a DEA registrant. If your testosterone came from a US pharmacy on a US prescription, the ceiling is not your rule; the container and the declaration still are.

    Public-health guidance

    “This 50 dosage unit limitation does not apply to controlled substances lawfully obtained in the United States pursuant to a prescription issued by a DEA registrant.”

    21 CFR 1301.26 — Exemptions from import or export requirements for personal medical use, via the electronic Code of Federal Regulations. Paragraphs (a), (b) and (c), including the sentence excluding US-dispensed prescriptions from the 50-dosage-unit ceiling.

What five labels actually say about storing the thing in your bag

Transcribed from the storage and handling sections of each label. Read the last column down: two of these products are actively incompatible instructions, and a man on testosterone and a GLP-1 is carrying both.

There is no general storage rule for injectables and this table is why. XYOSTED forbids the refrigeration that OZEMPIC requires. MOUNJARO’s single-dose presentation allows 21 days out of the fridge and OZEMPIC’s pen allows 56 — same class of drug, same kind of device, different number. Only the bacteriostatic water is silent about a period after opening, and this site prints "not stated" for that rather than borrowing the 28-day figure from elsewhere. Find your own product’s row before you pack, and if it is not here, find its own label.

The two federal rules that apply, quoted

One is a screening policy stated by TSA and one is a regulation. They do different jobs: the first is about getting through a checkpoint, the second is about crossing the border with a controlled substance, and testosterone is one.

The last two rows go together and the order they are usually reported in is backwards. The 50-dosage-unit limit is real and it is a limit on what you may bring INTO the United States that you obtained ABROAD. A US resident travelling with medication dispensed on a US prescription by a DEA registrant is outside it, by the regulation’s own next sentence. What still applies in that case is the rest of the section: original dispensed container, and a declaration to a customs officer. None of this is TSA’s business at a domestic checkpoint — the two rules are printed together because people conflate them, not because they overlap.

One bag, three products, three different requirements

A worked case rather than a rule, because there is no rule. This is what the first table means for a man on testosterone therapy who is also on a GLP-1 and mixes a peptide, packing for a week away.

The recurring error is treating "medication" as one category. It is not: within one bag, one product must not be refrigerated, one must be, one has a clock that started weeks ago, and one is a legally controlled substance whose packaging is part of the requirement. The practical version is to pack by label rather than by habit, and to keep the cartons.

When it does not go to plan

What we could not source

Widely taught techniques we went looking for and could not anchor to a label, a public-health body or a trial. Each entry names what was searched and what this page does instead.

Frequently asked questions

Can I take my testosterone on a plane?

Yes, and in your carry-on. TSA states that medically necessary liquids and medications may be brought "in excess of 3.4 ounces or 100 milliliters in your carry-on bag", removed from the bag to be screened separately. Testosterone is a Schedule III controlled substance by its own label, which matters at a border rather than at a domestic checkpoint: 21 CFR 1301.26 permits a person to enter or leave the United States with a schedule II to V substance lawfully obtained for personal medical use, provided it is in the original dispensed container and declared to a customs officer.

Is there a limit on how much medication I can travel with?

TSA states none for medically necessary liquids — the rule is that they are permitted above the ordinary 3.4 ounce limit and screened separately, with no quantity ceiling given. There is a federal limit for controlled substances, and it is narrower than it is usually reported: a US resident may import "no more than 50 dosage units combined of all such controlled substances" that were obtained abroad for personal medical use. The next sentence of the same paragraph is the one that matters for most readers — that limitation "does not apply to controlled substances lawfully obtained in the United States pursuant to a prescription issued by a DEA registrant".

Does testosterone need to be refrigerated?

No, and one product forbids it. DEPO-Testosterone’s storage instruction is 20° to 25°C, protected from light, with no refrigeration anywhere in it. XYOSTED goes further and states "Do Not refrigerate or freeze. Use at room temperature." That is the opposite of a GLP-1 pen, which must be refrigerated before first use — so a man carrying both cannot put them in the same cool bag. Cold storage of the oil is not neutral either: the label warns that crystals form during storage below the recommended temperature, and gives warming and shaking as the fix.

How long can a GLP-1 pen stay out of the fridge?

It depends on the product and on whether it has been used, and the two figures on the two labels we read differ by more than a factor of two. An OZEMPIC pen after first use can be kept for 56 days at 15 to 30 °C or refrigerated. A MOUNJARO single-dose pen or vial can be stored unrefrigerated at up to 30 °C for a total of 21 days, and the multi-dose presentations carry a different figure again. Two constraints apply to all of them: the allowance is cumulative rather than per episode, and freezing disqualifies the product outright rather than reducing it.

Do I need to keep the box?

Yes, for three separate reasons. Several labels require the carton for light protection — MOUNJARO’s says to store it in the original carton to protect from light, and OZEMPIC’s says the pen must be kept in the original carton until administration. The carton carries the lot number and expiry. And if the product is a controlled substance and you are crossing a US border, 21 CFR 1301.26 requires that it be "in the original container in which it was dispensed to the individual", which a decanted vial or a pill organiser is not.

What happens if my medication froze?

For several of these products the labelled answer is to discard it, not to assess it. MOUNJARO: "Do not freeze MOUNJARO. Do not use MOUNJARO if frozen." OZEMPIC: "Do not freeze OZEMPIC and do not use OZEMPIC if it has been frozen." These are not cautions about reduced potency; they are instructions not to use the product. The travel relevance is specific — an aircraft hold and a winter car boot both go below freezing, and a pen packed directly against a frozen gel block can too. If you cannot rule it out, the label has already answered the question.

Sources

1. [1]DEPO-Testosterone (testosterone cypionate injection, USP) — FDA label, Pharmacia & Upjohn, ANDA085635, via DailyMed. Storage and Handling, the crystal-redissolving instruction, and the Controlled Substance section stating Schedule III.
2. [2]XYOSTED (testosterone enanthate) injection — FDA prescribing information, Antares Pharma, Inc., via DailyMed. The one product in this table whose label prohibits refrigeration: "Do Not refrigerate or freeze. Use at room temperature."
3. [3]OZEMPIC (semaglutide) injection — FDA prescribing information, Novo Nordisk, via DailyMed. Section 16, Storage and Handling: refrigerated before first use, 56 days in use, do not freeze, keep in the original carton until administration.
4. [4]MOUNJARO (tirzepatide) injection — FDA prescribing information, Eli Lilly and Company, via DailyMed. Storage and Handling: refrigerated, 21 days unrefrigerated for the single-dose presentations, original carton, and the instruction not to use it if frozen.
5. [5]Bacteriostatic Water for Injection, USP — FDA prescribing information, Hospira, Inc., NDA 018802, via DailyMed. HOW SUPPLIED: "Store at 20 to 25°C (68 to 77°F)." No post-puncture or discard period appears anywhere on the label.
6. [6]Transportation Security Administration — Frequently Asked Questions, travelling with medication. "All passenger items must undergo security screening. It is recommended that medication be clearly labeled to facilitate the screening process." and the medically-necessary-liquids allowance above 3.4 ounces.
7. [7]21 CFR 1301.26 — Exemptions from import or export requirements for personal medical use, via the electronic Code of Federal Regulations. Paragraphs (a), (b) and (c), including the sentence excluding US-dispensed prescriptions from the 50-dosage-unit ceiling.