Jet lag

Prevent jet lag symptoms and arrive in good shape with Melatonin 3mg medication available to buy from Dr Fox Pharmacy after completing a short health assessment online.

Read medical information and answer medical questions to buy treatment online.

Jet lag medication

All medicine supplied is UK licensed.

photo of Melatonin 3mg pack

Melatonin (3mg)

£23.80 for 30 tablets

Buy treatment


Prices of Melatonin 3mg tablets from Dr Fox Pharmacy (in stock)
30 tablets60 tablets
Melatonin 3mg£23.80£45.30

Prescription fees

Dr Fox supplies medicine on prescription and charges a small prescription fee based on the order value of each prescription.

Prescriptions are issued by our doctors online and sent electronically to our pharmacy.

Order valuePrescription fee
up to £10£1.00
up to £20£2.00
up to £40£3.00
over £40£4.00

If you have your own private or NHS paper prescription please post to our pharmacy (details).

Dr Fox prices are 25%–50% lower than other UK online clinics.

Delivery charges

UK delivery only: £2.90 per consultation via Royal Mail 24 Signed For (1-3 working days with tracking).

Parcel forwarding services are not permitted. Use only UK home or work delivery address.

Returns and refunds - unwanted items can be returned within 14 working days for a full refund.

Medical information

Written and reviewed by a team of doctors. Dr Fox is regulated by the CQC & GPhC.

About jet lag and melatonin

Melatonin 3mg tablets are licensed in the UK to treat and prevent jet lag. Melatonin helps regulate the body's day night rhythm - the body clock. If jet lag symptoms are not improving after 5 days, medical advice should be sought. Drinking alcohol can make jet lag worse.

Dr Fox can only prescribe melatonin for jet lag not for other conditions such as chronic insomnia or shift work.

How many tablets do I need?

A pack of 30 melatonin 3mg tablets is sufficient to treat between three and six episodes of jet lag, depending whether one or two tablets is taken each day. Maximum of 10 treatments per year.

How to take melatonin for jet lag

Adults only. At destination take one or two 3mg tablets daily at your usual bed-time. Take two tablets if one does not work. Not to be taken before 8pm or after 4am. Best taken with liquid (not alcohol) preferably on an empty stomach (no food for 2 hours before and after). Forgotten tablets can be taken late, but not after 4am. Do not take double doses.

Taking more than the recommended dose (overdose) is likely to cause drowsiness, headache, dizziness, and nausea. Seek medical advice.

Can anyone take melatonin?

For adults only (over 18s). Some people with pre-existing medical conditions or taking certain medications should not take melatonin. This includes people with epilepsy, autoimmune disease, diabetes and kidney and live impairment. A full list of interacting medicines can be found in the patient information leaflet supplied with the melatonin tablets - includes sedatives, sleeping tablets, and antidepressants amongst others.

Melatonin and pregnancy, breastfeeding, and fertility

The effects of melatonin on unborn babies and breast-fed infants is unknown and therefore melatonin should not be taken in pregnancy or when breastfeeding. Women who might otherwise become pregnant whilst taking melatonin must use effective contraception.

Side effects of melatonin and cautions

Melatonin causes drowsiness. Do NOT drive or operate machinery after taking melatonin and take care with these activities during a course of jet lag treatment.

As with all medicines, some people experience side effects, although in most cases these are not serious.

Serious side effects: If serious side effects occur, seek urgent medical advice. These include chest pain (uncommon – affecting 1 in 100); reduced red blood cells (anaemia), reduced white blood cells (increased risk of infection), reduced platelets (increased bruising or bleeding), disorientation, fainting, visual symptoms, feeling your heart (palpitations, pounding heart and blood in the urine (rare – affecting 1 in 1,000). Allergic reactions with swelling of the mouth and tongue can occur (frequency unknown).

Non-serious side effects are listed below. A full and detailed list can be found at in the patient information leaflet supplied with the medicine pack.

Common side effects (may affect up to 1 in 10 people): headache, drowsiness.

Uncommon side effects (may affect up to 1 in 100 people): irritability, nervousness, restlessness, abnormal dreams, anxiety, dizziness, high blood pressure, abdominal pain, upper abdominal pain, indigestion, mouth ulceration, dry mouth, nausea, itching, rash, dry skin, excretion of glucose in the urine, excess protein in the urine, feeling unwell, weight increase.

Rare side effects (may affect up to 1 in 1000 people): high levels of certain fat molecules (triglycerides) in the blood, altered mood, aggression, increased sex drive, memory impairment, restless legs syndrome, 'pins and needles' sensation, watery eyes, hot flushes, vomiting, wind, excess saliva, bad breath, inflammation of the stomach lining, nail disorder, arthritis, muscle spasms, passing large volumes of urine, prolonged erection that might be painful, inflammation of the prostate gland, thirst, abnormal levels of electrolytes in the blood.

Frequency unknown: hypersensitivity reactions, high blood glucose level, flow of milk from the breasts (also in men).

Reporting of side effects: If you have any side effects, talk to your doctor or pharmacist, includes effects not listed above. You can also report side effects direct using the Yellow Card system -

Buy treatment

Dr Fox pharmacy supplies melatonin 3mg medication on prescription – you are required to answer a short medical questionnaire before your order can be completed.

Dr Tony Steele

Authored 14 February 2020 by Dr Tony Steele
MB ChB Sheffield University 1983. Former hospital doctor and GP.

Reviewed by Dr A. Wood, Dr C. Pugh, Dr B. Babor, Dr P. Hunt
Last reviewed 07 April 2021
Last updated 15 October 2021


  1. Medical questions
  2. Choose treatment
  3. Complete order
Order travel medicines only if absolutely certain you will travel.

Answer medical questions to order(jet lag)

Have you read the medical information?

Read the jet lag medical information. Dr Fox can only prescribe melatonin for jet lag not for other conditions such as chronic insomnia or shift work.

Have you been diagnosed with any of the following?

  • epilepsy
  • diabetes or impaired glucose tolerance
  • significant liver or kidney disease (ask your doctor if not sure)
  • autoimmune disease (body attacked by own immune system)

Do any of the following apply to you?

  • breastfeeding (risk unknown, not suitable)
  • pregnant (risk unknown, not suitable)
  • might become pregnant and not taking effective contraception

Are you taking any of the following medications?

  • fluvoxamine (an antidepressant)
  • psoralens (treatment for psoriasis)
  • cimetidine (treatment for stomach acid and ulcers)
  • quinolones (type of antibiotic)
  • rifampicin (type of antibiotic)
  • carbamazepine (anti-epileptic treatment)
  • benzodiazepines (various sedatives and sleeping tablets)
  • warfarin (anticoagulant - blood thinning)

Are you aware melatonin can cause drowsiness?

Melatonin may impair driving and operating machinery.

Do you have any further medical information or questions?

Is there anything you do not understand or do you need further help?

Do all the following apply to you?

  • The medication is for my own use and I will not share with anyone else
  • I will read the patient information leaflet supplied with the medication
  • I am over 18 and I agree to identity verification checks
  • I have completed this questionnaire myself and fully understand all the information
  • My responses are honest and accurate, and I understand that this is necessary for a safe medical assessment
  • I agree to the terms & conditions, privacy policy, & data sharing policy

The order process

Answer short medical questionnaire

Choose medication, register, and pay

Doctor issues prescription online

Pharmacy team post medication direct

Recent reviews

“Very good.”20 October 2021 – Anonymous

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“Re order & as usual prompt & excellent service.”20 October 2021 – Anonymous

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“Fast delivery completely priced”20 October 2021 – Anonymous

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