Doxycycline Confusional State Side Effect Reports


The following Doxycycline Confusional State side effect reports were submitted by healthcare professionals and consumers.

This information will help you understand how side effects, such as Confusional State, can occur, and what you can do about them.

A side effect could appear soon after you start Doxycycline or it might take time to develop.


Lupus-like Syndrome, Musculoskeletal Stiffness, Arthralgia, Movement Disorder, Gait Disturbance, Nausea, Headache, Confusional State

This Confusional State side effect was reported by a consumer or non-health professional from US. A 59-year-old female patient (weight:NA) experienced the following symptoms/conditions: acne. The patient was prescribed Doxycycline (dosage: 1 Pill Twice Daily), which was started on Oct 30, 2013. Concurrently used drugs: NA. When starting to take Doxycycline the consumer reported the following symptoms:
  • Lupus-like Syndrome
  • Musculoskeletal Stiffness
  • Arthralgia
  • Movement Disorder
  • Gait Disturbance
  • Nausea
  • Headache
  • Confusional State
The patient was hospitalized. These side effects may potentially be related to Doxycycline.
Pneumonia, Urosepsis, Urinary Tract Infection, Clostridium Test Positive, Confusional State, Dysuria, Hypotension, Diarrhoea, Escherichia Infection

This Confusional State Doxycycline side effect was reported by a health professional from GB on Jul 08, 2013. A Patient , 91 years of age, was diagnosed with and was treated with Doxycycline. The patient presented the following health conditions:
  • Pneumonia
  • Urosepsis
  • Urinary Tract Infection
  • Clostridium Test Positive
  • Confusional State
  • Dysuria
  • Hypotension
  • Diarrhoea
  • Escherichia Infection
. Doxycycline dosage: NA. Additional drugs used at the same time:
  • Levofloxacin
  • Levofloxacin
  • Ciprofloxacin
  • Benzylpenicillin
  • Ertapenem
  • Uniphyllin (theophylline-theophylline Anhydrous)
  • Thiamine
  • Vitamin B Compound (nicotinamide - Riboflavine- Thiamine Hydrochloride)
The patient was hospitalized.
Confusional State, Dysuria, Hypotension, Urosepsis, Escherichia Test Positive, Pneumonia, Diarrhoea, Clostridium Test Positive

This is a Doxycycline Hyclate Delayed-release Tablets 100mg (base0 (aelic) (doxcycline) side effect report of a 91-year-old patient (weight:NA) from DK, suffering from the following symptoms/conditions: chronic obstructive pulmonary disease, who was treated with Doxycycline Hyclate Delayed-release Tablets 100mg (base0 (aelic) (doxcycline) (dosage:NA, start time: Jan 30, 2011), combined with:
  • Flucloxaclillin (flucloxacillin)
  • Ciprofloxacin (ciprofloxacin)
  • Ertapenem (ertapenem)
  • Benzylpenicillin (benzylpenicillin)
  • Levofloxacin (levofloxacin)
  • Uniphyllin Continus
  • Thiamine
  • Vitamin B
, and developed a serious reaction and a Confusional State side effect. The patient presented with:
  • Confusional State
  • Dysuria
  • Hypotension
  • Urosepsis
  • Escherichia Test Positive
  • Pneumonia
  • Diarrhoea
  • Clostridium Test Positive
which developed after the beginning of treatment. The patient was hospitalized. This side effect report can indicate a possible existence of increased vulnerability to Doxycycline Hyclate Delayed-release Tablets 100mg (base0 (aelic) (doxcycline) treatment in patients suffering from chronic obstructive pulmonary disease, resulting in Confusional State.
Blood Glucose Decreased, Hyperhidrosis, Tremor, Palpitations, Confusional State

A 29-year-old female patient (weight: NA) from US with the following symptoms: acne started Doxycycline Hyclate treatment (dosage: NA) on Feb 27, 2013. Soon after starting Doxycycline Hyclate treatment, the consumer experienced several side effects, including:
  • Blood Glucose Decreased
  • Hyperhidrosis
  • Tremor
  • Palpitations
  • Confusional State
. Concurrently used drugs: NA. This finding indicates that some patients can be more vulnerable to developing Doxycycline Hyclate side effects, such as Confusional State.
Pyrexia, Headache, Myalgia, Hallucination, Visual, Confusional State

A female patient from US was prescribed and started Doxycycline Hyclate on Mar 14, 2013. Patient felt the following Doxycycline side effects: pyrexia, headache, myalgia, hallucination, visual, confusional state Additional patient health information: Female , 23 years of age, The consumer reported the following symptoms: was diagnosed with and. Doxycycline Hyclate dosage: NA. Concurrently used drugs: NA. The patient was hospitalized.
Clostridium Difficile Infection, Confusional State, Dysuria, Hypotension, Urosepsis, Diarrhoea, Pneumonia

This report suggests a potential Doxycycline Monohydrate Confusional State side effect(s) that can have serious consequences. A 91-year-old patient from GB (weight:NA) was diagnosed with the following health condition(s): chronic obstructive pulmonary disease,urosepsis and used Doxycycline Monohydrate (dosage: 100 Mg, 2x/day) starting Feb 18, 2011. Soon after starting Doxycycline Monohydrate the patient began experiencing various side effects, including:
  • Clostridium Difficile Infection
  • Confusional State
  • Dysuria
  • Hypotension
  • Urosepsis
  • Diarrhoea
  • Pneumonia
Drugs used concurrently:
  • Ciprofloxacin (400 Mg, 2x/day)
  • Ciprofloxacin Hcl (500 Mg, 2x/day)
  • Levofloxacin (500 Mg, 2x/day)
  • Levofloxacin (500 Mg, 2x/day)
  • Flucloxacillin (250 Mg, 4x/day)
  • Ertapenem (1 G, 1x/day)
  • Benzylpenicillin (600 Mg,unk)
  • Benzylpenicillin (1.2 Gm , Unk)
The patient was hospitalized. Although Doxycycline Monohydrate demonstrated significant improvements in a number of clinically relevant cases, troublesome symptoms, such as Confusional State, may still occur.
Clostridium Difficile Infection, Confusional State, Dysuria, Hypotension, Urosepsis, Diarrhoea, Pneumonia

An adverse event was reported by a pharmacist on Jan 21, 2013 by a Patient taking Doxycycline (dosage: NA) was diagnosed with and. Location: GB , 91 years of age, patient began experiencing various side effects, including: Directly after treatment started, patient experienced the unwanted or unexpected Doxycycline side effects: clostridium difficile infection, confusional state, dysuria, hypotension, urosepsis, diarrhoea, pneumonia. Additional medications/treatments:
Associated medications used:
  • Ciprofloxacin
  • Ciprofloxacin
  • Flucloxacillin
  • Ertapenem (Indication: Prescribed For E.coli In Urine.)
  • Benzylpenicillin
  • Benzylpenicillin
  • Levofloxacin
  • Levofloxacin
The patient was hospitalized.
Headache, Vision Blurred, Gait Disturbance, Dizziness, Muscular Weakness, Confusional State, Aphasia, Intracranial Pressure Increased

This Confusional State problem was reported by a health professional from US. A female patient (weight: NA) was diagnosed with the following medical condition(s): NA.On Sep 17, 2012 a consumer started treatment with Doxycycline Hyclate (dosage: NA). The following drugs/medications were being taken at the same time:
  • Influenza Vaccine (0.5 Ml Injection)
When commencing Doxycycline Hyclate, the patient experienced the following unwanted symptoms /side effects:
  • Headache
  • Vision Blurred
  • Gait Disturbance
  • Dizziness
  • Muscular Weakness
  • Confusional State
  • Aphasia
  • Intracranial Pressure Increased
The patient was hospitalized. Although all drugs are carefully tested before they are licensed for use, they carry potential side effect risks. Some side effects, such as Confusional State, may become evident only after a product is in use by the general population.
Confusional State, Malaise, Cognitive Disorder, Treatment Noncompliance

This is a Doxycycline Hyclate side effect report of a 26-year-old female patient (weight: NA) from DK. The patient developed the following symptoms/conditions: NA and was treated with Doxycycline Hyclate (dosage: NA) starting Jul 28, 2012. Concurrently used drugs:
  • Fluoxetine
  • Fortisip
  • Erythromycin
  • Phenoxymethylpenicillin
Soon after that, the consumer experienced the following of symptoms:
  • Confusional State
  • Malaise
  • Cognitive Disorder
  • Treatment Noncompliance
The patient was hospitalized. This opens a possibility that Doxycycline Hyclate could cause Confusional State and that some female patients may be more susceptible.
Confusional State, Dyskinesia, Malaise

This Confusional State side effect was reported by a physician from GB on Aug 30, 2012. A female patient from GB , 26 years of age, weighting 85.98 lb, was treated with Doxycycline. Directly after treatment started, patient experienced the unwanted or unexpected Doxycycline side effects: confusional state, dyskinesia, malaise. Doxycycline dosage: NA.
Associated medications used:
  • Erythromycin
  • Fluoxetine
  • Fortisip
The patient was hospitalized. These side effects may potentially be related to Doxycycline.
Cholelithiasis, Diarrhoea, Confusional State, Hepatitis Cholestatic, Liver Disorder, Cyst

This Confusional State side effect was reported by a physician from UNITED STATES. A 80-year-old patient (weight:NA) experienced the following symptoms/conditions: NA. The patient was prescribed Doxycycline (dosage: NA), which was started on Feb 07, 2008. Concurrently used drugs:
  • Augmentin '125'
When starting to take Doxycycline the consumer reported the following symptoms:
  • Cholelithiasis
  • Diarrhoea
  • Confusional State
  • Hepatitis Cholestatic
  • Liver Disorder
  • Cyst
These side effects may potentially be related to Doxycycline.
Cognitive Disorder, Confusional State, Hallucinations, Mixed, Disorientation

This Confusional State Doxycycline side effect was reported by a health professional from UNITED KINGDOM on Feb 10, 2012. A Female , 43 years of age, was treated with Doxycycline. The patient presented the following health conditions:
  • Cognitive Disorder
  • Confusional State
  • Hallucinations, Mixed
  • Disorientation
. Doxycycline dosage: NA. Additional drugs used at the same time:
  • Ventolin
  • Symbicirt (budesonide W/formoterol Fumarate)
  • Levofloxacin (500 Mg, Oral)
The patient was hospitalized.
Cognitive Disorder, Hallucinations, Mixed, Confusional State, Disorientation

This is a Doxycycline side effect report of a 43-year-old female patient (weight:NA) from UNITED KINGDOM, suffering from the following symptoms/conditions: NA, who was treated with Doxycycline (dosage:Unk, start time: Dec 20, 2011), combined with:
  • Symbicort
  • Levofloxacin (500 Mg, Unk)
  • Ventolin
, and developed a serious reaction and a Confusional State side effect. The patient presented with:
  • Cognitive Disorder
  • Hallucinations, Mixed
  • Confusional State
  • Disorientation
which developed after the beginning of treatment. The patient was hospitalized. This side effect report can indicate a possible existence of increased vulnerability to Doxycycline treatment in female patients suffering from NA, resulting in Confusional State.
Confusional State, Off Label Use, Cardiac Arrest, Memory Impairment

A patient (weight: NA) from UNITED STATES with the following symptoms: NA started Doxycycline treatment (dosage: Unk) on Jul 04, 2008. Soon after starting Doxycycline treatment, the consumer experienced several side effects, including:
  • Confusional State
  • Off Label Use
  • Cardiac Arrest
  • Memory Impairment
. Concurrently used drugs:
  • Simvastatin (Unk)
  • Prograf (3 Mg, Bid)
  • Celexa (Unk)
  • Humalog (Unk)
  • Aspirin (Unk)
  • Clonidine (Unk)
  • Lantus (Unk)
  • Allopurinol (Unk)
This finding indicates that some patients can be more vulnerable to developing Doxycycline side effects, such as Confusional State.
Postural Orthostatic Tachycardia Syndrome, Syncope, Cholecystitis Chronic, Confusional State, Pain, Asthenia, Headache, Head Injury

A female patient from UNITED STATES was prescribed and started Doxycycline on Oct 13, 2010. After Doxycycline was administered, patient encountered several Doxycycline side effects: postural orthostatic tachycardia syndrome, syncope, cholecystitis chronic, confusional state, pain, asthenia, headache, head injury Additional patient health information: Female , weighting 145.5 lb, The consumer reported the following symptoms: . Doxycycline dosage: NA. Concurrently used drugs:
  • Multi-vitamins
  • Minocycline Hcl
  • Albuterol
  • Singulair
  • Yaz (Unk)
  • Yasmin (1 Df, Qd)
  • Lexapro (Unk)
The patient was hospitalized.
Confusional State, Postural Orthostatic Tachycardia Syndrome, Headache, Cholecystitis Chronic, Head Injury, Pain, Asthenia, Syncope

This report suggests a potential Doxycycline Confusional State side effect(s) that can have serious consequences. A female patient from UNITED STATES (weight:NA) was diagnosed with the following health condition(s): NA and used Doxycycline (dosage: NA) starting Sep 23, 2003. Soon after starting Doxycycline the patient began experiencing various side effects, including:
  • Confusional State
  • Postural Orthostatic Tachycardia Syndrome
  • Headache
  • Cholecystitis Chronic
  • Head Injury
  • Pain
  • Asthenia
  • Syncope
Drugs used concurrently:
  • Multi-vitamins
  • Yaz (Unk)
  • Albuterol
  • Minocycline Hcl
  • Singulair
  • Lexapro (Unk)
  • Yasmin (1 Df, Qd)
The patient was hospitalized. Although Doxycycline demonstrated significant improvements in a number of clinically relevant cases, troublesome symptoms, such as Confusional State, may still occur.
Confusional State, Dyspepsia, Dyspnoea, Headache, Hypersensitivity, Malaise, Nausea, Oedema Peripheral, Polyarthritis

An adverse event was reported by a health professional on Jul 13, 2010 by a Female taking Doxycycline (dosage: NA) was diagnosed with and. Location: UNITED KINGDOM , 67 years of age, patient began experiencing various side effects, including: Patient felt the following Doxycycline side effects: confusional state, dyspepsia, dyspnoea, headache, hypersensitivity, malaise, nausea, oedema peripheral, polyarthritis. Additional medications/treatments:
Multiple prescriptions taken:
  • Amoxicillin
The patient was hospitalized.
Confusional State, Discomfort, Dyspepsia, Dyspnoea, Headache, Hypersensitivity, Malaise, Nausea, Oedema Peripheral

This Confusional State problem was reported by a health professional from UNITED KINGDOM. A 67-year-old female patient (weight: NA) was diagnosed with the following medical condition(s): cough.On Mar 29, 2010 a consumer started treatment with Doxycycline Hyclate (dosage: 100 Mg, Unk). The following drugs/medications were being taken at the same time:
  • Amoxicillin
When commencing Doxycycline Hyclate, the patient experienced the following unwanted symptoms /side effects:
  • Confusional State
  • Discomfort
  • Dyspepsia
  • Dyspnoea
  • Headache
  • Hypersensitivity
  • Malaise
  • Nausea
  • Oedema Peripheral
The patient was hospitalized. Although all drugs are carefully tested before they are licensed for use, they carry potential side effect risks. Some side effects, such as Confusional State, may become evident only after a product is in use by the general population.
Abdominal Pain Upper, Abnormal Behaviour, Amnesia, Bronchitis, Chest Discomfort, Chest Pain, Confusional State, Depression

This is a Doxycycline 100mg Mutual side effect report of a female patient (weight: NA) from UNITED STATES. The patient developed the following symptoms/conditions: upper respiratory tract infection and was treated with Doxycycline 100mg Mutual (dosage: 100mg 2 A Day Orally) starting Mar 31, 2009. Concurrently used drugs: NA. Soon after that, the consumer experienced the following of symptoms:
  • Abdominal Pain Upper
  • Abnormal Behaviour
  • Amnesia
  • Bronchitis
  • Chest Discomfort
  • Chest Pain
  • Confusional State
  • Depression
This opens a possibility that Doxycycline 100mg Mutual could cause Confusional State and that some female patients may be more susceptible.
Abdominal Pain Upper, Anxiety, Back Pain, Confusional State, Heart Rate Increased, Panic Attack

This Confusional State side effect was reported by a consumer or non-health professional from UNITED STATES on Mar 31, 2009. A patient from UNITED STATES , 41 years of age, weighting 189.0 lb, was diagnosed with and was treated with Doxycycline. Patient felt the following Doxycycline side effects: abdominal pain upper, anxiety, back pain, confusional state, heart rate increased, panic attack. Doxycycline dosage: 1 Twice Daily Po. These side effects may potentially be related to Doxycycline.

DISCLAIMER: ALL DATA PROVIDED AS-IS, refer to terms of use for additional information.

Doxycycline Confusional State Causes and Reviews


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Doxycycline Confusional State Reviews

Sun, 22 Mar 2009
I was taking Doxycycline for meibomitis and a little over 2 weeks after I started I came ill with severe head pressure,tinnitus,chills,nausea,flulike symptoms and after 2 emergency room visits and 6 different doctors (who were trying to treat me for sinuses,unknown reactions,and migraines)I was finally told by my opthalmologist(who was very aware of my symptoms and said doxy not the cause) finally consulted a neurologist and informed me last week that indeed it can cause all of these symptoms.What I would like to know is,does anyone know how long symptoms remain after stopping the doxy?Thanks
Wed, 03 Jun 2009
i am anaemic and i've been treating my acne with Doxycycline but instead my anaemia got worse i'm drowzy,my head feels heavy and i have a headache from hell.
Sun, 07 Jun 2009
I was taking Doxycycline for an MRSA staph infection. I had tightness in my chest and worsening difficulty breathing, sore tongue, burning palms and soles of my feet, and extreme exhaustion. At the end of my 9th day on the medication, I had excrutiating headaches, I was unable to eat and drinking more than a sip of anything made me unable to breathe. I didn't even think about this being a side effect of the antibiotic. It was really scary. I stopped taking it two days ago, and I still feel somewhat bad, but I can at least breathe again now.
Sat, 15 May 2010
The doctor had prescribed me 100 mg Doxycycline twice daily for 14 days. On 9th day of medication, I had itching in different parts of my body. Then I consulted the doctor but he asked me to continue the Doxycycline and complete the course. To control itching he gave me antihistaminic drug for the remaining medication period. Even after completing the course of medicine I had little bit itching for one more week.
Wed, 08 Dec 2010
I was taking them as an anti-malarial. Caused a duodenal ulcer and a bleed on the brain, either of which could have killed me. Both nearly did, I had 3 months in hospital and 8 operations before I was discharged. I will probably never be properly well again.
Fri, 10 Dec 2010
I have just taken myself off Doxycycline. I had so much pressure in my skull - unable to stand for very long, felt really weak and thought I was going to pass out..A Few pains in my kidney area.
Sat, 05 Mar 2011
I am a 45 year old women who developed acne 4 years agao after my hysterectomy.I have been using Doxycycline for the last 10 months......the only side effects I have experienced are nausea if pill tkn in empty stomach and weight gain ( which could be just my age). I took myself off the pills for 3 weeks, but my acne returned worse than ever!!! I have started taking it again...with in 3 day sthere was a marked improvement. Clearly I will continue taking it......what are the effects of taking this drug over long periods of time? Can any one help me on this?
Mon, 21 Mar 2011
I took Doxycycline for 10 days for perioral dermatitis. A week after completing the medicine I went to the ER with a burning in my chest. Then I lost my appetite, was nauseous and started losing weight. Three weeks later I was diagnosed with gastroparesis. I went on motility medication and changed my diet. It has been 14 months, I am improved, no longer taking the medication and able to eat small meals that are easily digestible. I know of 4 other people who developed gastroparesis after taking Doxycycline.
Sun, 22 May 2011
i had these 100mg tablets for a sinus infection its gone now i take the last 1 tomorrow but after the few few days on them i ad to take 8 2 to start with then 1 a day. so after a few days on them i got 2 complaints my anus was a bit sore and neck and shoulder pain stiffness so ill be glad to get the last 1 took now tomorrow.
Thu, 15 Sep 2011
I am 11 days into a 20 day regime of Doxycycline for Staph. I am 51 and have not had a period in 2 years. 2 days ago I had some breast tenderness and this morning I woke to classic menstrual bleeding with abdominal cramps. Could the Doxycycline be responsible for this in some way? Should I follow up with my GP or call my GYN?
DISCLAIMER: ALL DATA PROVIDED AS-IS, refer to terms of use for additional information.

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Top Doxycycline Side Effects

Headache (176)
Nausea (172)
Rash (127)
Pain (125)
Vomiting (125)
Dyspnoea (124)
Dizziness (123)
Haemorrhage (116)
Malaise (114)
Diarrhoea (111)
Oesophageal Ulcer (100)
Pyrexia (97)
Chest Pain (95)
Fatigue (93)
Anxiety (92)
Pruritus (92)
Abortion Incomplete (91)
Photosensitivity Reaction (88)
Asthenia (82)
Abdominal Pain Upper (71)
Depression (41)
Abdominal Pain (40)
Anaemia (38)
Stevens-johnson Syndrome (35)
Suicidal Ideation (34)
Muscle Spasms (32)
Confusional State (32)
Vision Blurred (31)
Oesophagitis (31)
Oedema Peripheral (31)
Dyspepsia (30)
Hypotension (30)
Pancreatitis (30)
Syncope (30)
Benign Intracranial Hypertension (29)
Paraesthesia (28)
Palpitations (28)
Arthralgia (27)
Erythema (27)
Visual Impairment (27)
Intracranial Pressure Increased (27)
Pulmonary Embolism (27)
Dysphagia (26)
Blister (26)
Abdominal Discomfort (25)
Pancreatitis Acute (25)
Renal Failure Acute (25)
Panic Attack (25)
Hypersensitivity (24)
Swollen Tongue (24)

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