Common Benylin Side Effects


The most commonly reported Benylin side effects (click to view or check a box to report):

Insomnia (6)
Fatigue (6)
Incorrect Dose Administered (5)
Dizziness (5)
Depression (4)
Loss Of Consciousness (4)
Somnolence (4)
Amnesia (3)
Somnambulism (3)
Vomiting (3)
Syncope (3)
Headache (3)
Bacterial Infection (3)
Confusional State (3)
Anxiety (3)
Asthenia (3)
Feeling Drunk (3)
Hallucination (3)
Anosmia (2)
Ageusia (2)

➢ More



If you or someone in your family has experienced a serious side effect to a health product, you are encouraged to report the experience to your health care professional (e.g. physician, pharmacist). You could also complete a copy of the side effect reporting form or report your side effect to FDA.

Benylin Side Effects Reported to FDA



Benylin Side Effect Report#9900368
Hallucination, Abnormal Dreams, Insomnia
This is a report of a 26-year-old male patient (weight: NA) from CA, suffering from the following health symptoms/conditions: influenza,nasopharyngitis, who was treated with Benylin 1 All-in-one Cold And Flu Daytime (dosage: NA, start time:
Oct 01, 2013), combined with: NA. and developed a serious reaction and side effect(s): Hallucination, Abnormal Dreams, Insomnia after the beginning of treatment. This case can indicate the possible existence of increased vulnerability to Benylin 1 All-in-one Cold And Flu Daytime treatment in male patients, resulting in Hallucination side effect.
Benylin Side Effect Report#9655582
Hallucination, Nightmare
This report suggests a potential Benylin 1 All-in-one Cold And Flu Day Hallucination side effect(s) that can have serious consequences. A 23-year-old female patient (weight: NA) from CA was diagnosed with the following symptoms/conditions: nasopharyngitis,influenza and used Benylin 1 All-in-one Cold And Flu Day (dosage: NA) starting
Oct 01, 2013. After starting Benylin 1 All-in-one Cold And Flu Day the patient began experiencing various side effects, including: Hallucination, NightmareAdditional drugs used concurrently: NA. Although Benylin 1 All-in-one Cold And Flu Day demonstrated significant improvements in a number of clinically relevant cases, troublesome symptoms, such as Hallucination, may still occur.
Benylin Side Effect Report#9375189
Blood Glucose Increased, Off Label Use
This Blood Glucose Increased problem was reported by a consumer or non-health professional from CA. A 66-year-old male patient (weight: NA) was diagnosed with the following symptoms/conditions: nasopharyngitis,diabetes mellitus. On
Jun 16, 2013 this consumer started treatment with Benylin Aio Cold + Flu Day Liquid (dosage: 30ml Every 6 Hours). The following drugs were being taken at the same time:
  • Short Acting Insulin (8-10 Years)
  • Long Acting Insulin (8-10 Years)
  • Metformin (20 Years)
  • Lipitor (10 Years)
  • Water Pill Nos
When using Benylin Aio Cold + Flu Day Liquid, the patient experienced the following unwanted symptoms/side effects: Blood Glucose Increased, Off Label UseAlthough all drugs are carefully tested before they are licensed for use, they carry side effect risks. Some side effects, such as Blood Glucose Increased, may become evident only after a product is in use by the general population.
Benylin Side Effect Report#9312658
Overdose, Breath Alcohol Test Positive
This Overdose side effect was reported by a consumer or non-health professional from ZA. A 50-year-old male patient (weight:NA) experienced the following symptoms/conditions: influenza.The patient was prescribed Benylin (drug dosage: NA), which was initiated on NS. Concurrently used drugs: NA..After starting to take Benylin the consumer reported adverse symptoms, such as: Overdose, Breath Alcohol Test PositiveThese side effects may potentially be related to Benylin.
Benylin Side Effect Report#9216134
Wheezing, Pruritus, Rash, Hot Flush
This is a report of a 26-year-old female patient (weight: NA) from CA, suffering from the following health symptoms/conditions: influenza,thyroid disorder, who was treated with Benylin 1 All-in-one Cold And Flu Day (dosage: 30 Ml 1 Time, start time:
Mar 28, 2013), combined with:
  • Synthroid (1x Per Day 5+years)
and developed a serious reaction and side effect(s): Wheezing, Pruritus, Rash, Hot Flush after the beginning of treatment. This case can indicate the possible existence of increased vulnerability to Benylin 1 All-in-one Cold And Flu Day treatment in female patients, resulting in Wheezing side effect. The patient was hospitalized.
Benylin Side Effect Report#8854110
Transient Ischaemic Attack, Syncope, Skin Discolouration, Breath Sounds Abnormal, Loss Of Consciousness, Pulse Absent, Slow Speech, Hypoaesthesia, Coordination Abnormal
This report suggests a potential Benylin Transient Ischaemic Attack side effect(s) that can have serious consequences. A 43-year-old male patient (weight: NA) from CA was diagnosed with the following symptoms/conditions: cough and used Benylin (dosage: NA) starting
Jun 17, 2012. After starting Benylin the patient began experiencing various side effects, including: Transient Ischaemic Attack, Syncope, Skin Discolouration, Breath Sounds Abnormal, Loss Of Consciousness, Pulse Absent, Slow Speech, Hypoaesthesia, Coordination AbnormalAdditional drugs used concurrently: NA.The patient was hospitalized. Although Benylin demonstrated significant improvements in a number of clinically relevant cases, troublesome symptoms, such as Transient Ischaemic Attack, may still occur.
Benylin Side Effect Report#8123163-3
Loss Of Consciousness, Hypoaesthesia, Dizziness, Nausea, Diarrhoea, Insomnia
This Loss Of Consciousness problem was reported by a consumer or non-health professional from Canada. A 30-year-old female patient (weight: NA) was diagnosed with the following symptoms/conditions: nasopharyngitis,contraception. On
Jan 01, 2009 this consumer started treatment with Benylin (dosage: Took 2 Caplets In Afternoon, And 5 Hours Later Took 1 Caplet (before 6pm)). The following drugs were being taken at the same time:
  • Alesse
  • Alesse
When using Benylin, the patient experienced the following unwanted symptoms/side effects: Loss Of Consciousness, Hypoaesthesia, Dizziness, Nausea, Diarrhoea, InsomniaAlthough all drugs are carefully tested before they are licensed for use, they carry side effect risks. Some side effects, such as Loss Of Consciousness, may become evident only after a product is in use by the general population.
Benylin Side Effect Report#7726675-7
Syncope, Swollen Tongue, Swelling Face, Hypersensitivity, Pharyngeal Oedema, Tinnitus, Dizziness, Muscular Weakness
This Syncope side effect was reported by a health professional from United Kingdom. A 28-year-old female patient (weight:NA) experienced the following symptoms/conditions: cough.The patient was prescribed Benylin (drug dosage: NA), which was initiated on
Feb 11, 1995. Concurrently used drugs: NA..After starting to take Benylin the consumer reported adverse symptoms, such as: Syncope, Swollen Tongue, Swelling Face, Hypersensitivity, Pharyngeal Oedema, Tinnitus, Dizziness, Muscular WeaknessThese side effects may potentially be related to Benylin. The patient was hospitalized.
Benylin Side Effect Report#7377689-0
Joint Swelling, Abasia, Thrombosis, Pruritus, Incorrect Dose Administered, Activities Of Daily Living Impaired, Oedema Peripheral
This is a report of a 38-year-old female patient (weight: NA) from Canada, suffering from the following health symptoms/conditions: nasopharyngitis, who was treated with Benylin Extra Strength Cold, Mucus And Phlegm (dosage: One Tablet Per Hour For 6 Hours, start time: NS), combined with: NA. and developed a serious reaction and side effect(s): Joint Swelling, Abasia, Thrombosis, Pruritus, Incorrect Dose Administered, Activities Of Daily Living Impaired, Oedema Peripheral after the beginning of treatment. This case can indicate the possible existence of increased vulnerability to Benylin Extra Strength Cold, Mucus And Phlegm treatment in female patients, resulting in Joint Swelling side effect.
Benylin Side Effect Report#6942805-9
Anxiety, Blood Pressure Increased, Chest Pain, Heart Rate Increased
This report suggests a potential Benylin Four Flu Anxiety side effect(s) that can have serious consequences. A 24-year-old male patient (weight: NA) from South Africa was diagnosed with the following symptoms/conditions: NA and used Benylin Four Flu (dosage: Text:18 Tabs Over 2/3 Days As Prescribed) starting NS. After starting Benylin Four Flu the patient began experiencing various side effects, including: Anxiety, Blood Pressure Increased, Chest Pain, Heart Rate IncreasedAdditional drugs used concurrently: NA. Although Benylin Four Flu demonstrated significant improvements in a number of clinically relevant cases, troublesome symptoms, such as Anxiety, may still occur.
Benylin Side Effect Report#6595709-8
Oesophageal Haemorrhage
This Oesophageal Haemorrhage problem was reported by a consumer or non-health professional from United States. A 73-year-old male patient (weight: NA) was diagnosed with the following symptoms/conditions: oropharyngeal pain. On
Jan 14, 2010 this consumer started treatment with Benylin (dosage: NA). The following drugs were being taken at the same time:
  • Cortef
  • Nystatin
  • Tetracycline
When using Benylin, the patient experienced the following unwanted symptoms/side effects: Oesophageal HaemorrhageAlthough all drugs are carefully tested before they are licensed for use, they carry side effect risks. Some side effects, such as Oesophageal Haemorrhage, may become evident only after a product is in use by the general population.
Benylin Side Effect Report#6400371-0
Accidental Exposure, Vomiting
This Accidental Exposure side effect was reported by a consumer or non-health professional from Canada. A 2-year-old male patient (weight:NA) experienced the following symptoms/conditions: accidental exposure.The patient was prescribed Benylin (drug dosage: NA), which was initiated on NS. Concurrently used drugs: NA..After starting to take Benylin the consumer reported adverse symptoms, such as: Accidental Exposure, VomitingThese side effects may potentially be related to Benylin. The patient was hospitalized.
Benylin Side Effect Report#6051871-7
Petit Mal Epilepsy
This is a report of a 23-year-old female patient (weight: NA) from Canada, suffering from the following health symptoms/conditions: cough,epilepsy, who was treated with Benylin Dm Syrup (dosage: Text:2 Doses, start time:
Jan 01, 2003), combined with:
  • Lamotrigine (Text:100 Mg 2 Pills 2x Day)
  • Clonazepam (Text:0.5 Mg 2 Pills 2x Day)
  • Topiramate (Text:100 Mg 1 Pill 2x Day)
and developed a serious reaction and side effect(s): Petit Mal Epilepsy after the beginning of treatment. This case can indicate the possible existence of increased vulnerability to Benylin Dm Syrup treatment in female patients, resulting in Petit Mal Epilepsy side effect.
Benylin Side Effect Report#6018487-X
Amnesia, Bacterial Infection, Confusional State, Somnambulism, Somnolence
This report suggests a potential Benylin All-in-one Cold + Flu Night Caplets Amnesia side effect(s) that can have serious consequences. A 66-year-old female patient (weight: NA) from Canada was diagnosed with the following symptoms/conditions: nasopharyngitis and used Benylin All-in-one Cold + Flu Night Caplets (dosage: Text:2 Caplets Every 6 Hours) starting NS. After starting Benylin All-in-one Cold + Flu Night Caplets the patient began experiencing various side effects, including: Amnesia, Bacterial Infection, Confusional State, Somnambulism, SomnolenceAdditional drugs used concurrently:
  • Fosamax
  • Evista
  • Multi-vitamins
  • Calcium
The patient was hospitalized. Although Benylin All-in-one Cold + Flu Night Caplets demonstrated significant improvements in a number of clinically relevant cases, troublesome symptoms, such as Amnesia, may still occur.
Benylin Side Effect Report#6015348-7
Asthenia, Dizziness, Fatigue, Loss Of Consciousness
This Asthenia problem was reported by a consumer or non-health professional from Canada. A 15-year-old male patient (weight: NA) was diagnosed with the following symptoms/conditions: NA. On NS this consumer started treatment with Benylin Extra Strength Cough Cold And Sore Throat (dosage: NA). The following drugs were being taken at the same time: NA. When using Benylin Extra Strength Cough Cold And Sore Throat, the patient experienced the following unwanted symptoms/side effects: Asthenia, Dizziness, Fatigue, Loss Of ConsciousnessAlthough all drugs are carefully tested before they are licensed for use, they carry side effect risks. Some side effects, such as Asthenia, may become evident only after a product is in use by the general population.
Benylin Side Effect Report#6014929-4
Amnesia, Bacterial Infection, Confusional State, Somnambulism, Somnolence
This Amnesia side effect was reported by a consumer or non-health professional from Canada. A 66-year-old female patient (weight:NA) experienced the following symptoms/conditions: nasopharyngitis.The patient was prescribed Benylin All-in-one Cold + Flu Night Caplets (drug dosage: Text:4 Caplets (2 In Am And 2 6-hours-later)), which was initiated on NS. Concurrently used drugs:
  • Fosamax
  • Evista
  • Multi-vitamins
  • Calcium
.After starting to take Benylin All-in-one Cold + Flu Night Caplets the consumer reported adverse symptoms, such as: Amnesia, Bacterial Infection, Confusional State, Somnambulism, SomnolenceThese side effects may potentially be related to Benylin All-in-one Cold + Flu Night Caplets. The patient was hospitalized.
Benylin Side Effect Report#6009890-2
Asthenia, Dizziness, Fatigue, Loss Of Consciousness
This is a report of a 15-year-old male patient (weight: NA) from Canada, suffering from the following health symptoms/conditions: NA, who was treated with Benylin Dm-d-e Extra Strength (dosage: NA, start time: NS), combined with: NA. and developed a serious reaction and side effect(s): Asthenia, Dizziness, Fatigue, Loss Of Consciousness after the beginning of treatment. This case can indicate the possible existence of increased vulnerability to Benylin Dm-d-e Extra Strength treatment in male patients, resulting in Asthenia side effect.
Benylin Side Effect Report#6004766-9
Amnesia, Bacterial Infection, Confusional State, Somnambulism, Somnolence
This report suggests a potential Benylin 1 All-in-one Cold And Flu Night Amnesia side effect(s) that can have serious consequences. A 66-year-old female patient (weight: NA) from Canada was diagnosed with the following symptoms/conditions: nasopharyngitis and used Benylin 1 All-in-one Cold And Flu Night (dosage: Text:4 Caplets (2 In Am And 2 6-hours-later)) starting NS. After starting Benylin 1 All-in-one Cold And Flu Night the patient began experiencing various side effects, including: Amnesia, Bacterial Infection, Confusional State, Somnambulism, SomnolenceAdditional drugs used concurrently:
  • Fosamax
  • Evista
  • Multi-vitamins
  • Calcium
The patient was hospitalized. Although Benylin 1 All-in-one Cold And Flu Night demonstrated significant improvements in a number of clinically relevant cases, troublesome symptoms, such as Amnesia, may still occur.
Benylin Side Effect Report#5989400-6
Ageusia, Anosmia, Depression, Fatigue, Headache, Insomnia, Weight Decreased
This Ageusia problem was reported by a consumer or non-health professional from Canada. A 42-year-old female patient (weight: NA) was diagnosed with the following symptoms/conditions: nasopharyngitis. On
Aug 19, 2008 this consumer started treatment with Benylin 1 All-in-one Cold And Flu Day (dosage: Text:2 Day Caplets). The following drugs were being taken at the same time: NA. When using Benylin 1 All-in-one Cold And Flu Day, the patient experienced the following unwanted symptoms/side effects: Ageusia, Anosmia, Depression, Fatigue, Headache, Insomnia, Weight DecreasedAlthough all drugs are carefully tested before they are licensed for use, they carry side effect risks. Some side effects, such as Ageusia, may become evident only after a product is in use by the general population.
Benylin Side Effect Report#5925332-7
Ageusia, Anosmia, Depression, Fatigue, Headache, Insomnia, Weight Decreased
This Ageusia side effect was reported by a consumer or non-health professional from Canada. A 42-year-old female patient (weight:NA) experienced the following symptoms/conditions: nasopharyngitis.The patient was prescribed Benylin 1 All-in-one Cold And Flu Day (drug dosage: Text:2 Day Caplets), which was initiated on
Aug 19, 2008. Concurrently used drugs: NA..After starting to take Benylin 1 All-in-one Cold And Flu Day the consumer reported adverse symptoms, such as: Ageusia, Anosmia, Depression, Fatigue, Headache, Insomnia, Weight DecreasedThese side effects may potentially be related to Benylin 1 All-in-one Cold And Flu Day.
Benylin Side Effect Report#5719932-7
Dizziness, Syncope
This is a report of a 85-year-old female patient (weight: NA) from Canada, suffering from the following health symptoms/conditions: NA, who was treated with Benylin (dosage: 1 Dose Of 2 Spoonsfuls, Oral, start time: NS), combined with: NA. and developed a serious reaction and side effect(s): Dizziness, Syncope after the beginning of treatment. This case can indicate the possible existence of increased vulnerability to Benylin treatment in female patients, resulting in Dizziness side effect.
Benylin Side Effect Report#5695724-2
Convulsion
This report suggests a potential Benylin Convulsion side effect(s) that can have serious consequences. A 4.-year-old male patient (weight: NA) from Canada was diagnosed with the following symptoms/conditions: NA and used Benylin (dosage: NA) starting NS. After starting Benylin the patient began experiencing various side effects, including: ConvulsionAdditional drugs used concurrently:
  • Dimetapp
  • Triaminic Cold + Cough (chlorphenamine Maleate, Dextromethorphan Hydro (Oral)
Although Benylin demonstrated significant improvements in a number of clinically relevant cases, troublesome symptoms, such as Convulsion, may still occur.
Benylin Side Effect Report#5694044-X
Convulsion
This Convulsion problem was reported by a consumer or non-health professional from Canada. A 4.-year-old male patient (weight: NA) was diagnosed with the following symptoms/conditions: nasopharyngitis. On NS this consumer started treatment with Benylin (dosage: NA). The following drugs were being taken at the same time:
  • Dimetapp
  • Triaminic-12
  • Triaminic-12
When using Benylin, the patient experienced the following unwanted symptoms/side effects: ConvulsionAlthough all drugs are carefully tested before they are licensed for use, they carry side effect risks. Some side effects, such as Convulsion, may become evident only after a product is in use by the general population.
Benylin Side Effect Report#5165867-0
Haemoptysis, Insomnia
This Haemoptysis side effect was reported by a consumer or non-health professional from Canada. A 3-year-old male patient (weight:NA) experienced the following symptoms/conditions: cough.The patient was prescribed Benylin Dm 12 Hour Syrup (dextromethorphan) (drug dosage: One Teaspoonful, Once, Oral), which was initiated on
Nov 13, 2006. Concurrently used drugs: NA..After starting to take Benylin Dm 12 Hour Syrup (dextromethorphan) the consumer reported adverse symptoms, such as: Haemoptysis, InsomniaThese side effects may potentially be related to Benylin Dm 12 Hour Syrup (dextromethorphan).
Benylin Side Effect Report#5082609-8
Feeling Abnormal, Incorrect Dose Administered, Insomnia
This is a report of a 26-year-old male patient (weight: NA) from Canada, suffering from the following health symptoms/conditions: cough, who was treated with Benylin Dm-d-e With Methactin (pseudoephedrine, Dextromethorphan, Guai (dosage: 100 Ml, Oral, start time:
Jul 30, 2006), combined with: NA. and developed a serious reaction and side effect(s): Feeling Abnormal, Incorrect Dose Administered, Insomnia after the beginning of treatment. This case can indicate the possible existence of increased vulnerability to Benylin Dm-d-e With Methactin (pseudoephedrine, Dextromethorphan, Guai treatment in male patients, resulting in Feeling Abnormal side effect.


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The appearance of Benylin on this list does not mean that FDA has concluded that the drug has the listed risk. It means that FDA has identified a potential safety issue, but it does not mean that FDA has found a causal relationship between the drug and the listed risk.

What are common Benylin Side Effects for Women?

Women Side Effects Reports
Depression 4
Fatigue 4
Somnolence 4
Amnesia 3
Bacterial Infection 3
Confusional State 3
Dizziness 3
Incorrect Dose Administered 3
Insomnia 3
Somnambulism 3

What are common Benylin Side Effects for Men?

Men Side Effects Reports
Insomnia 3
Loss Of Consciousness 3
Accidental Exposure 2
Asthenia 2
Convulsion 2
Dizziness 2
Fatigue 2
Hallucination 2
Incorrect Dose Administered 2
Off Label Use 2

Track Your Side Effects

Note Your Observations

It is really important to keep track of your health symptoms, right from the time you start a new medicine. You can do it any way you prefer: in a notebook, in a computer file or using our online tool. You should also note down any other medicines you are taking at the same time, because there could be an interaction between these medicines.

Why Your Notes are Important

Your notes could be helpful in several ways:

  • You can use them to remind you of details that may alert your health care professional(s) to a problem
  • You will have a record to refer to in the future, in case you are ever prescribed the same medicine again

  • Log Form

    You can use the following log form to write down important information, like the date and time you experienced a side effect and your symptoms, how strong the symptoms were, and any other medicines you were using.

    Medicine Name and Dosage:
    Side Effects Scale Date & Time Other Medicine(s) or Treatment(s)
    Scale: 1 = very mild to 10 = very bad

    Side effects reports are analyzed to discover potential health product safety signals. Some important reactions may take an extremely long time to develop or occur infrequently. Continued monitoring of adverse reactions is thus essential to maintain a comprehensive safety and effectiveness profile of health products.

    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.

    Benylin reports list potential signals of serious risks and new safety information that were identified using the FDA Adverse Event Reporting System (FAERS).
    FAERS is a database that contains information on adverse event and medication errors reports submitted to FDA by healthcare professionals (such as physicians, pharmacists, nurses and others), consumers (such as patients, family members, layers and others) and manufacturers.

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