Namenda vs. Calan


We compare the side effects and drug effectiveness of Namenda and Calan. The study is created by eHealthMe based on reports of 65,017 people who take Namenda and Calan, and is updated regularly.

What's eHealthMe?

eHealthMe is a health data analysis company based in Mountain View, California. eHealthMe monitors and analyzes the outcomes of drugs and supplements that are currently on the market. The results are readily available to health care professionals and consumers.

eHealthMe has released original studies on market drugs and worked with leading universities and institutions such as IBM, London Health Science Centre, Mayo Clinic, Northwestern University and VA. eHealthMe studies have now been referenced in over 500 peer-reviewed medical publications.

How we gather our data?

Healthcare data is obtained from a number of sources including the Food and Drug Administration (FDA). This information is aggregated and used to produce personalized reports that patients can reference.

The information that eHealthMe collects includes:

  • Side effects (including severity and how people recover from them)
  • Associated conditions or symptoms
  • Drug effectiveness
  • Demographic data regarding drug use

How the study uses the data?

The study is based on memantine hydrochloride and verapamil hydrochloride (the active ingredients of Namenda and Calan, respectively). Other drugs that have the same active ingredients (e.g. generic drugs or brand names) are also considered.

What is Namenda?

Namenda has active ingredients of memantine hydrochloride. It is often used in dementia. (latest outcomes from Namenda 11,786 users)

What is Calan?

Calan has active ingredients of verapamil hydrochloride. It is often used in high blood pressure. (latest outcomes from Calan 3,554 users)

How to use the study?

Patients can bring a copy of the report to their healthcare provider to ensure that all drug risks and benefits are fully discussed and understood. It is recommended that patients use the information presented as a part of a broader decision-making process.

On Mar, 19, 2019

65,017 people who take Namenda and Calan are studied.

Number of reports submitted per year:

Namenda vs Calan drug comparison reports.

Drugs in this study:

  • Calan (verapamil hydrochloride)
  • Namenda (memantine hydrochloride)

Most common side effects:

  1. Dyspnoea (difficult or laboured respiration)
  2. Nausea (feeling of having an urge to vomit)
  3. Drug Ineffective
  4. Fatigue (feeling of tiredness)
  5. Completed Suicide (act of taking one's own life)
  6. Headache (pain in head)
  7. Pain
  8. Diarrhoea
  9. Dizziness
  10. Hypotension (abnormally low blood pressure)
  1. Confusional State
  2. Fall
  3. Dizziness
  4. Somnolence (a state of near-sleep, a strong desire for sleep)
  5. Fatigue (feeling of tiredness)
  6. Asthenia (weakness)
  7. Nausea (feeling of having an urge to vomit)
  8. Drug Ineffective
  9. Agitation (state of anxiety or nervous excitement)
  10. Diarrhoea

Most common side effects experienced by people in long term use:

  1. Dizziness
  2. Hypotension (abnormally low blood pressure)
  3. Dyspnoea (difficult or laboured respiration)
  4. Syncope (loss of consciousness with an inability to maintain postural tone)
  5. Nausea (feeling of having an urge to vomit)
  6. Fall
  7. Anxiety
  8. Vomiting
  9. Pain
  10. Fatigue (feeling of tiredness)
  1. Fall
  2. Confusional State
  3. Urinary Tract Infection
  4. Aggression
  5. Agitation (state of anxiety or nervous excitement)
  6. Dizziness
  7. Hallucination (an experience involving the perception of something not present)
  8. Cholelithiasis (the presence or formation of gallstones in the gallbladder or bile ducts)
  9. Convulsion (muscles contract and relax rapidly and repeatedly, resulting in an uncontrolled shaking of the body)
  10. Depression

Drug effectiveness:

  • not at all: 3.29 %
  • somewhat: 18.8 %
  • moderate: 33.82 %
  • high: 31.88 %
  • very high: 12.21 %
  • not at all: 18.13 %
  • somewhat: 39.01 %
  • moderate: 27.2 %
  • high: 13.46 %
  • very high: 2.2 %

Do you take Namenda or Calan?

You are not alone:

Related studies:

Compare Namenda with similar drugs
Compare Calan with similar drugs

Recent updates

Recent general studies
Recent personal studies

WARNING: Please DO NOT STOP MEDICATIONS without first consulting a physician since doing so could be hazardous to your health.

DISCLAIMER: All material available on is for informational purposes only, and is not a substitute for medical advice, diagnosis, or treatment provided by a qualified healthcare provider. All information is observation-only, and has not been supported by scientific studies or clinical trials unless otherwise stated. Different individuals may respond to medication in different ways. Every effort has been made to ensure that all information is accurate, up-to-date, and complete, but no guarantee is made to that effect. The use of the eHealthMe site and its content is at your own risk.

You may report adverse side effects to the FDA at or 1-800-FDA-1088 (1-800-332-1088).

If you use this eHealthMe study on publication, please acknowledge it with a citation: study title, URL, accessed date.