In short

  • Most people who use Lymecycline, will not experience side effects, but if they do, the side effects tend to be minor and short in duration.
  • As their bodies get accustomed to the drug, the side effects should resolve.
  • Side effects may include: headache, diarrhoea, loss of appetite, nausea, rash and visual disturbances.

Most people who use Lymecycline, will not experience side effects, but if they do, the side effects tend to be minor and short in duration. As their bodies get accustomed to the drug, the side effects should resolve.

Side effects may include: headache, diarrhoea, loss of appetite, nausea, rash and visual disturbances. Some people may experience an allergic reaction to Lymecycline. The symptoms of an allergic reaction include: redness, itchiness or rashes on the skin, swelling in the extremities or the tongue and difficulty breathing. Allergic reactions can be fatal, so if you experience any of these symptoms, then stop taking the drug right away and contact medical help immediately.

In rare cases, Lymecycline can also cause a sensitivity to light (including sunlight) and UV radiation. Therefore, while taking Lymecycline, it is a good idea to avoid excessive exposure to direct sunlight and tanning beds. Make sure to apply sunscreen when you leave the house to reduce the effects of UV. 

Other side effects, may also be present, so ensure you read the patient information leaflet for any medication you are taking. If you notice anything unusual, speak to your doctor, who can give you advice on what to do.

What should I do if I don’t experience any change after taking Lymecycline?

If after several days, you do not experience any changes to your acne or bacterial infection, you should speak to your doctor. They are not likely to increase your dose, but may prescribe you an alternative treatment (such as Oxytetracycline).

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Sources

References

2 sources were selected to match the subject of this article. Link destinations were checked twice when added. This does not mean every statement has been individually source-mapped or clinically approved.

  1. How and when to take lymecycline

    NHS · HTML · medicine dosing guidance · Page reviewed in 2026 · Link destination checked 5 September 2026

  2. Tetralysal 300mg Hard Capsules — Summary of Product Characteristics

    electronic medicines compendium (emc) · HTML · SmPC · Last updated on emc 12 August 2026 · Link destination checked 5 September 2026

Reference links open the cited source pages. If you spot something out of date, tell our content team.

Who wrote this

Written and reviewed by our team

Authored by

Hywel McGlinchy - Pharmacist and Medical Writer

Pharmacist / Content Writer

Hywel has been a registered pharmacist since 2017; he started with Simple Online Pharmacy in 2020. Hywel was responsible for helping review and author accurate site content. He worked with our GPs to make sure all aspects of the medications mentioned are covered.

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Medically reviewed by

Karim Nassar, Co-Founder, Pharmacist & Author

Karim Nassar

Co-Founder, Pharmacist & Author

Karim is a registered pharmacist with the General Pharmaceutical Council (GPhC) and was a founding member of Simple Online Healthcare in 2015. With a Master of Pharmacy degree from Strathclyde University, Karim brings a strong foundation in pharmaceutical care and a passion for leveraging digital solutions to improve patient access to healthcare.

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Sources cited

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