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Leave jet lag behind

What Is Jet Lag?

Jet lag is a temporary condition characterised by disrupted sleep, fatigue, and disorientation. It is caused by travelling through different time zones at a rapid pace.

What causes jet lag?

When you cross multiple time zones, you disrupt your body's circadian rhythm. Often referred to as your internal clock, your circadian rhythm regulates a roughly 24-hour cycle of physical, mental, and behavioural processes. It responds primarily to the pattern of light and darkness in your environment, and affects everything from digestion to blood pressure.

Your circadian rhythm helps to control when you wake up and when you fall asleep. When you travel across time zones, your circadian rhythm can't adjust as quickly as you've travelled. This causes jet lag, as your internal clock is still set to the time zone you came from, not the time zone you're currently in. Until your internal clock adjusts to its new time zone, you may be affected by the symptoms of jet lag.

What are the symptoms of jet lag?

Jet lag's main symptoms are excessive sleepiness, daytime fatigue, and a disturbed sleep pattern. Other symptoms include gastrointestinal problems, disorientation, irritability, dizziness, headaches, and a general unwell feeling.

Symptoms may vary from person to person. They usually last no more than one or two days, but may last longer depending on how far you've travelled, how many time zones you've crossed, and what direction you've flown in. Dehydration, stress, and old age can also increase the likelihood and severity of jet lag.

How can I recover from jet lag?

Jet lag is not a serious condition, but it can make it difficult to adjust to your new destination. Several tips can help to speed up recovery, such as spending time outside in natural light or avoiding sleeping until the correct time, even if you are tired. Avoiding caffeine and alcohol during and immediately after travel can also help, as they may dehydrate the body and affect sleep patterns.

What medication treats jet lag?

Some travellers also find using the medication Melatonin helpful. Melatonin is a natural hormone created by the brain's pineal gland. It helps to signal to your body that it is time to sleep, causing you to feel drowsy. When jet lag disrupts your body clock, it can also disrupt the hormone's production. Our medication makes up for this disruption and regulates your sleep pattern. This allows you to more easily adjust to your new routine after you've travelled.

121doc offers Melatonin which can be safely used for those who travel regularly. Additionally, it has very mild side effects.

Medical review byDr. Caroline FontanaLast review 04 November 2025
Dr. Caroline Fontana

FAQs

What is included in the online consultation?
Will a doctor review my consultation?
What happens after I submit my order?
What services are included with my order?
Is the price all-inclusive?
What are my delivery options?
Is it safe to buy prescription medication online?
Is this service discreet?
What is included in the online consultation?

Our online consultations are in the format of short medical questionnaires. You will be asked general questions about your health and medical history, as well as specific medical questions relevant to the treatment you have chosen. We will also ask you for your payment and delivery details to complete the order.

Online consultations take no longer than 5 minutes to complete. All questions are necessary when issuing prescription medicines. It means that our doctors can make sure the treatment is safe and right for you.

Will a doctor review my consultation?

Yes, it is a legal requirement that all online consultations are reviewed by a registered doctor. This is to make sure the chosen treatment is safe and right for you to take. All personal information is stored securely and confidentially.

Please note, all orders are subject to doctor approval, and we cannot guarantee that your order will be approved.

What happens after I submit my order?

Your online consultation will be sent directly to our medical team, where it will be reviewed by on of our in-house doctors.

If a doctor approves you for treatment, they will issue a prescription. Your prescription will then be forwarded to our pharmacist, where you medication will be dispensed and dispatched for delivery.

What services are included with my order?

Every order includes:

  • Free consultation - your consultation will be personally reviewed by one of our registered doctors.
  • Free prescription - a doctor will issue you a prescription if approved for treatment.
  • Free delivery - we provide free express delivery across Europe, you should receive your order in 1-2 working days.
Is the price all-inclusive?

Yes, our service is all-inclusive and there are no hidden fees. All 121doc orders include a free online consultation, a free prescription and free express delivery.

What are my delivery options?

We offer several delivery options at no extra charge:

  • Next-day delivery
  • UPS Access Point - convenient parcel drop-off and collection near your home or work address
  • Nominated-day delivery - choose the most convenient day for delivery

All these options can be tracked and require a signature on delivery. If you are not in, a friend or relative can sign in your place.

Is it safe to buy prescription medication online?

It is safe to buy prescription medications online from genuine and reputable healthcare providers, like 121doc.

Our medical staff and facilities are registered with the relevant medical governing bodies. We also ensure your data is protected by adhering to European data privacy laws.

You can learn more about our certifications here.

Is this service discreet?

Our patients’ privacy is of utmost importance. All your medical information is securely stored and only viewed by our doctors. We do not share your details with third-parties. We are also closely adhere to data privacy laws.

All orders will only show on invoices, bank statements, etc. as ‘HHC Ltd’.