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Back Pain (35)
Neck Pain (31)
Shortness Of Breath (18)
Light Chest Pain (17)
Depression (17)
Extremely Bad Pain In Oesophagus (15)
Fatigue (12)
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Doxycycline Side Effects and Adverse Effects reported to US Food and Drug Administration (FDA)

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Showing 1-25 of 1250 

Diarrhoea, Dehydration (8448456-1)
on Jun 15, 2012 Female from UNITED STATES , 74 years of age, weighting 103.3 lb, was diagnosed with
  • non-small cell lung cancer
and was treated with Doxycycline. Directly after, patient experienced the unwanted or unexpected Doxycycline side effects: diarrhoea, dehydration. Doxycycline dosage: 200 Milligram;.
Associated medications used:
  • Janumet
  • Acetylsalicylic Acid Srt
  • Acetaminophen
  • Dacomitinib (45 Milligram;)
  • Glimepiride
  • Benazepril Hydrochloride
  • Esomeprazole Magnesium
  • Multi-vitamins
Patient was hospitalized.

Foreign Body, Oesophageal Pain, Oesophageal Ulcer (8448236-7)
Patient was taking Doxycycline. Patient felt the following Doxycycline side effects: foreign body, oesophageal pain, oesophageal ulcer on Jun 14, 2012 from UNITED KINGDOM Additional patient health information: Female , 28 years of age, weighting 154.3 lb, . Doxycycline dosage: 100 Mg, Unk. Patient was hospitalized.

Product Quality Issue, No Adverse Event (8442188-1)
Adverse event was reported on Feb 21, 2012 by a Female taking Doxycycline (Dosage: N/A) was diagnosed with
  • acne
  • attention deficit/hyperactivity disorder
and. Location: UNITED STATES , weighting 133.0 lb, After Doxycycline was administered, patient encountered several Doxycycline side effects: product quality issue, no adverse event.
Multiple concurrent drugs taken:
  • Daytrana (30 Mg, Unk)


Fall, Hypoglycaemia, Loss Of Consciousness, Pulse Pressure Decreased, Rash, Head Injury, Convulsion (8439889-8)
on Jun 11, 2012 Male from UNITED STATES , weighting 126.0 lb, was diagnosed with
  • acne
and was treated with Doxycycline. Directly after, patient experienced the unwanted or unexpected Doxycycline side effects: fall, hypoglycaemia, loss of consciousness, pulse pressure decreased, rash, head injury, convulsion. Doxycycline dosage: 100 Mg, Twice Daily, Po.


Respiratory Failure, Hepatitis Acute, Dehydration, Lower Respiratory Tract Infection, Pneumocystis Jiroveci Pneumonia, Gastroenteritis Viral, Hyponatraemia, Pneumonitis (8435700-X)
on May 29, 2012 Female from AUSTRALIA , weighting 170.6 lb, was treated with Doxycycline. Patient felt the following Doxycycline side effects: respiratory failure, hepatitis acute, dehydration, lower respiratory tract infection, pneumocystis jiroveci pneumonia, gastroenteritis viral, hyponatraemia, pneumonitis. Doxycycline dosage: N/A.
Multiple prescriptions taken:
  • Fluoxetine
  • Carbamazepine (100 Mg;bid;po)
  • Valproate Sodium
  • Metaclopramide
  • Oxycodone Hcl
  • Fluoxetine
  • Pantoprazole
  • Fluticasone Propionate/salmeterol
Patient was hospitalized.

Erectile Dysfunction, Sexual Dysfunction, Libido Decreased (8434315-7)
Patient was taking Doxycycline. After Doxycycline was administered, patient encountered several Doxycycline side effects: erectile dysfunction, sexual dysfunction, libido decreased on Jun 11, 2012 from UNITED KINGDOM Additional patient health information: Male , 28 years of age, weighting 140.0 lb, was diagnosed with
  • acne
and. Doxycycline dosage: N/A.
Multiple concurrent drugs taken:
  • Erythromycin
  • Beclomethasone Dipropionate


Paraesthesia, Rash, Photodermatosis (8434075-X)
Adverse event was reported on Jun 01, 2012 by a Male taking Doxycycline (Dosage: N/A) . Location: UNITED KINGDOM , 75 years of age, weighting 165.3 lb, Directly after, patient experienced the unwanted or unexpected Doxycycline side effects: paraesthesia, rash, photodermatosis.
Associated medications used:
  • Ventolin
  • Tiotropium Bromide
  • Omeprazole
  • Beclomethasone Dipropionate
  • Salmeterol
  • Tamsulosin Hydrochloride
  • Prednisolone
  • Prednisolone


Nausea (8425199-1)
on Jun 01, 2012 Male from UNITED STATES , weighting 374.8 lb, was diagnosed with
  • staphylococcal infection
and was treated with Doxycycline Hyclate. Patient felt the following Doxycycline side effects: nausea. Doxycycline Hyclate dosage: 100 Mg, 2x/day.

Stevens-johnson Syndrome (8422521-7)
on May 18, 2012 Female from GERMANY , 45 years of age, was treated with Doxycycline. After Doxycycline was administered, patient encountered several Doxycycline side effects: stevens-johnson syndrome. Doxycycline dosage: N/A.
Multiple concurrent drugs taken:
  • Ciloxan


Angioedema, Cough (8420979-0)
Patient was taking Doxycycline Hyclate. Directly after, patient experienced the unwanted or unexpected Doxycycline side effects: angioedema, cough on Jun 05, 2012 from ITALY Additional patient health information: Female , 33 years of age, . Doxycycline Hyclate dosage: Unk.

Swollen Tongue, Pruritus, Pharyngeal Oedema (8420870-X)
Adverse event was reported on May 25, 2012 by a Female taking Doxycycline (Dosage: N/A) . Location: UNITED KINGDOM , 29 years of age, Patient felt the following Doxycycline side effects: swollen tongue, pruritus, pharyngeal oedema.

Chest Discomfort, Oropharyngeal Pain, Skin Irritation, Agitation, Tremor, Urticaria, Oral Disorder (8419693-7)
on Jun 04, 2012 Female from UNITED STATES , 51 years of age, weighting 187.0 lb, was diagnosed with
  • pneumonia
and was treated with Doxycycline Hyclate. After Doxycycline was administered, patient encountered several Doxycycline side effects: chest discomfort, oropharyngeal pain, skin irritation, agitation, tremor, urticaria, oral disorder. Doxycycline Hyclate dosage: 1 Capsule By Mouth Twice Daily Po.

Swollen Tongue, Pharyngeal Oedema, Pruritus (8418192-6)
on May 25, 2012 Female from UNITED KINGDOM , 29 years of age, was treated with Doxycycline. Directly after, patient experienced the unwanted or unexpected Doxycycline side effects: swollen tongue, pharyngeal oedema, pruritus. Doxycycline dosage: N/A.

Gait Disturbance, Muscular Weakness, Dizziness, Balance Disorder, Pain In Extremity (8417163-3)
Patient was taking Doxycycline. Patient felt the following Doxycycline side effects: gait disturbance, muscular weakness, dizziness, balance disorder, pain in extremity on Jun 01, 2012 from UNITED STATES Additional patient health information: Male , weighting 173.0 lb, was diagnosed with
  • erythema
  • blood cholesterol abnormal
and. Doxycycline dosage: N/A.
Multiple prescriptions taken:
  • Lipitor (Unk)
  • Lipitor (40 Mg, Daily)


Inflammatory Carcinoma Of The Breast, Activities Of Daily Living Impaired (8415687-6)
Adverse event was reported on May 30, 2012 by a Female taking Doxycycline (Dosage: N/A) . Location: UNITED STATES , 68 years of age, After Doxycycline was administered, patient encountered several Doxycycline side effects: inflammatory carcinoma of the breast, activities of daily living impaired.
Multiple concurrent drugs taken:
  • Nicotrol (10 Mg Puff Upto 10 Times A Day)
  • Synthroid
  • Multi-vitamins
  • Ergocalciferol


Product Quality Issue, No Adverse Event (8408836-7)
on Feb 21, 2012 Female from UNITED STATES , weighting 133.0 lb, was diagnosed with
  • acne
  • attention deficit/hyperactivity disorder
and was treated with Doxycycline. Directly after, patient experienced the unwanted or unexpected Doxycycline side effects: product quality issue, no adverse event. Doxycycline dosage: N/A.
Associated medications used:
  • Daytrana (30 Mg, Unk)


Swollen Tongue, Pharyngeal Oedema, Pruritus (8408468-0)
on May 22, 2012 Female from UNITED KINGDOM , 29 years of age, was treated with Doxycycline. Patient felt the following Doxycycline side effects: swollen tongue, pharyngeal oedema, pruritus. Doxycycline dosage: N/A.

Headache (8408266-8)
Patient was taking Doxycycline. After Doxycycline was administered, patient encountered several Doxycycline side effects: headache on May 31, 2012 from UNITED STATES Additional patient health information: Male , weighting 148.4 lb, was diagnosed with
  • acne
and. Doxycycline dosage: 100mg 1 Po Bid Po.

Stevens-johnson Syndrome (8405347-X)
Adverse event was reported on May 21, 2012 by a Female taking Doxycycline (Dosage: Unk) . Location: NETHERLANDS , 45 years of age, Directly after, patient experienced the unwanted or unexpected Doxycycline side effects: stevens-johnson syndrome.
Associated medications used:
  • Ciprofloxacin (Unk)
  • Cyclophosphamide
  • Prednisolone
Patient was hospitalized.

Presyncope (8405263-3)
on May 25, 2012 Female from UNITED KINGDOM , 94 years of age, was treated with Doxycycline. Patient felt the following Doxycycline side effects: presyncope. Doxycycline dosage: Two To Start Then One Daily.
Multiple prescriptions taken:
  • Hypromellose (One Drop When Required)
  • Alendronate Sodium
  • Senna-mint Waf (Take At One Or Two At Night)
  • Trimethoprim (10ml At Night)
  • Calcichew Forte Chewable Tablets


Alopecia (8402833-3)
on May 14, 2012 Female from UNITED KINGDOM , 32 years of age, weighting 121.3 lb, was treated with Doxycycline. After Doxycycline was administered, patient encountered several Doxycycline side effects: alopecia. Doxycycline dosage: N/A.
Multiple concurrent drugs taken:
  • Amoxicillin
  • Yasmin


Chest Discomfort, Scar, Herpes Simplex, Odynophagia, Oesophagitis Ulcerative (8402272-5)
Patient was taking Doxycycline. Directly after, patient experienced the unwanted or unexpected Doxycycline side effects: chest discomfort, scar, herpes simplex, odynophagia, oesophagitis ulcerative on May 21, 2012 from BRUNEI DARUSSALAM Additional patient health information: Female , 45 years of age, was diagnosed with
  • purulent discharge
and. Doxycycline dosage: (100 Mg Daily),. Patient was hospitalized.

Presyncope (8401942-2)
Adverse event was reported on May 25, 2012 by a Female taking Doxycycline Monohydrate (Dosage: Two To Start Then One Daily) . Location: UNITED KINGDOM , 94 years of age, Patient felt the following Doxycycline side effects: presyncope.
Multiple prescriptions taken:
  • Latanoprost (50 Mg 1 Drop Every Night To The Left Eye)
  • Senna-mint Waf (7.5 Mg Take At One Or Two At Night)
  • Ciprofloxacin (250 Mg In 5mls Twice Daily)
  • Salmeterol (125 Ug, 2x/day)
  • Albuterol (1100mg Inhaled As Two Doses When Needed)
  • Nitrofurantoin (50 Mg, 1x/day)
  • Aqueous Cream (As Needed)
  • Hypromellose (One Drop When Required)


Vision Blurred, Headache, Feeling Abnormal, Vomiting (8401293-6)
on May 30, 2012 Female from UNITED STATES , weighting 120.0 lb, was diagnosed with
  • arthropod bite
and was treated with Doxycycline Hyclate. After Doxycycline was administered, patient encountered several Doxycycline side effects: vision blurred, headache, feeling abnormal, vomiting. Doxycycline Hyclate dosage: 100 Mg 2x Day.

Presyncope (8398144-5)
on May 25, 2012 Male from UNITED KINGDOM , 94 years of age, was treated with Doxycycline. Directly after, patient experienced the unwanted or unexpected Doxycycline side effects: presyncope. Doxycycline dosage: 100 Mg, Unk.
Associated medications used:
  • Acetaminophen (250 Mg, Unk)
  • Latanoprost (50 Mg, Unk)
  • Senna-mint Waf (7.5 Mg, Unk)


Showing 1-25 of 1250 

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It is very important to keep track of all side effects and discuss them with your doctor. If you think you may have a medical emergency, call your doctor or 911 immediately.

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Most drugs have a large list of nonsevere or mild adverse effects which do not rule out continued usage. These effects depend on individual sensitivity, and can include nausea, dizziness, diarrhea, malaise, vomiting, headache, dermatitis, dry mouth, etc. Check commonly reported side effects . These can be considered a form of pseudo-allergic reaction, as not all users experience these effects; many users experience none at all.

You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.

Doxycycline Information

Alternative DOXYCYCLINE Names:DOXYCYCLI

Active Ingredient: DOXYCYCLI

Doxycycline Dosage, Warnings, Usage.

Side Effects reported to FDA: 1250. View Doxycycline Adverse Reports

Doxycycline safety alerts: 2001

Reported deaths: 43

Reported hospitalizations: 379

Public Health Advisory: Doxycycline for Anthrax Exposure

Audience: Health professionals and general public

FDA reminds all health professionals and the general public that Doxycycline is approved for the treatment of anthrax in all its forms. The FDA is providing additional information concerning the dosing regimen for the treatment of anthrax, including cutaneous and inhalation anthrax (post-exposure). The currently recommended dosage regimen of doxycycline for severe disease is 100 mg every 12 hours for adults and 1mg per pound (2.2mg per kilogram) every 12 hours for children less than 100 pounds. These dosage regimens are appropriate for use in patients who have been exposed to anthrax (Bacillus anthracis) regardless of the route of exposure.

[Oct 18, 2001 - Public Health Advisory - FDA]

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