HIV Flashcards

1
Q

Background

A
  • HIV- Human Immunodeficiency Virus
  • AIDS- Acquired Immunodeficiency Syndrome
  • AIDS- Advanced stage of HIV
  • AIDS very rare now thanks to the development of medications
  • Prior to medication- very high mortality rate
  • No current cures or vaccines, only option is medication to control the virus and prevent AIDS
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2
Q

Background CD4 and infection

A
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3
Q

Starting medication

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  • Key blood results- CD4 count, HIV viral load, HIV viral resistance
  • Patient factors- shock acceptance, stigma
  • Other factors- age, co-infections (TB, HepB,C), malignancy, Pregnancy, partner status (TasP)
  • Other medications- interactions
  • Other medical conditions- renal, liver, CVD
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4
Q

Which combination

A
  • Various abbreviation
  • ARV’s- Anti Retrovirals
  • ART- Anti Retroviral Therapy
  • HAART- Highly Active Anti Retroviral Therapy
  • cART- Combination Anti Retroviral Therapy
  • BHIVA- British HIV Association
    • Responsible for guidelines relating to HIV treatment and are part of NICE
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5
Q

Which combination

A
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6
Q

Treatment goals

A
  • Aiming for patient to have an undetectable HIV viral load and for this to be maintained
  • CD4 count to increase. In most cases this will increase to be in the range of the non-infected population so patient will no longer be immunocompromised
  • Patients need to be fully adherent to their HIV medication in order to have an undetectable viral load and prevent any complications (Infection/cancer/nephropathy)
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7
Q

Adherence

A
  • Adherence to medicines is defined as the extent to which the patient’s action matches the agreed recommendations
  • Non-adherence may limit the benefits of medicines, resulting in lack of improvement, or deterioration, in health
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8
Q

Adherence

What this means for HIV patients

A
  • Take your medication everyday at the same time(s)
  • Do not miss any doses
  • Nothing less than 100% adherence is acceptable
  • Missing your medication will lead to resistance developing
  • This can mean needing to take more medication, more often and dealing with more side effects as well as more interactions.
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9
Q

Barriers to adherence

A
  • Acceptance
  • Knowledge/understanding
  • Side effects
  • Drug interactions
  • Language barriers
  • Medication factors
  • Disclosure
  • Stigma
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10
Q

Acceptance

A
  • Patients struggle to comes to terms with diagnosis
  • They can be in shock, denial or fell they are being persecuted
  • Scenario 1- Patient refused to accept he was HIV positive. When shown his blood results, he claimed they were somebody else’s and we had mixed up the sample labels. He therefore refused to take medication for a condition he didn’t think he had. Further blood tests and input from clinic staff later convinced him
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11
Q

Acceptance

Scenario 2

A
  • Patient was routinely tested during pregnancy and found to be HIV positive. Patient looked and felt well so the result came as a major shock. She accepted that she was HIV positive, but the hospital had given it to her as part of a conspiracy to ensure clinic staff have jobs and drug companies make money selling HIV medication. Took 2 years to convince her otherwise with help from support groups and social workers
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12
Q

Knowledge/understanding

A
  • Patients not aware of what HIV is or that treatment is available which will improve their health and prevent deterioration if taken properly
  • Some still think being diagnosed with HIV is a death sentence
  • Some think taking HIV meds is like taking a course of antibiotics-
  • Other think they can stop once their viral load is undetectable- because they are cured
  • We provide information leaflets for all meds, booklets on HIV treatment, show demo pulls and links to reliable websites as standard counselling
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13
Q

Side effects

A
  • The biggest concern from patients when starting medication.
  • Leads to anxiety when being experienced but also when not being experienced as patients feel the medication isn’t working.
  • Efavirenz- feeling dizzy, drowsy, depressed and having odd dreams (4D’s). Component of Atripla.
  • Rilpivirne- bloating and flatulence
  • Darunavir- nausea and diarrhoea
  • Atazanavir- raised bilirubin, jaundiced look-see image. Patients don’t like looking in the mirror or being approached by people saying ‘you don’t look right’
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14
Q

Side effects scenario

A
  • Are the symptoms improving?
  • Side effects
  • Is the patient observing the 2 hour food time window?
  • What kind of food is the patient taking e.g. high fat content
  • How much Atripla is the patient taking?
  • Has the patients work pattern changed?
  • Any social/domestic changes recently?
  • Any other drugs-OTC/GP/Herbal/Recreational?
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15
Q
A
  • These side effects are common when first taking Atripla/Efavirenz
  • The fact that they are resolving is a good sign and advise patient to carry on taking it
  • Continue taking Atripla with a banana, despite two hour food time window
  • Patient to be given doctors appointment should the side effects continue to be troublesome for a month
  • Arrange follow up appointment with a pharmacist
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16
Q

Drug interactions

A
  • Very common with HIV drugs
  • Biggest HIV drug culprits- Ritonavir, Efavirenz, Cobicistat
  • Patients, GP’s, specialist consultants, nurses and pharmacists not aware.
  • Always check for prescribed, OTC, herbal and also recreational drugs (an increasing problem).
  • Where to look: Liverpool University Website
17
Q

PI boosting example

A
18
Q

Interactions

Ritonavir

A
  • Simvastatin- leads to marked increase in concentrations which could increase the potential for serious reactions such as myopathy including rhabdomyolysis
  • Fluticasone- increases fluticasone AUC by 350 fold and Cmax by 25-fold
    • This results in a significant decrease (86%) in plasma cortisol AUC
    • Systematic corticosteroid effects, including Cushing’s syndrome and adrenal suppression, have been reported
  • Sildenafil- levels substantially increase with dose not to exceed 25mg in 48hrs
  • Cocaine- levels can be increase leading to toxicity
19
Q

Interactions

Non-HIV drugs

A
  • Omeprazole- decreases atazanavir AUC by 75%
  • Garlic capsules- decrease saquinavir exposure by 50%
  • St Johns Wort- significant decreases in HIV drug plasma concentrations are expected due to induction of CYP3A4 enzymes
  • Ginkgo biloba- may decrease levels of efavirenz
  • Recreational drugs
20
Q

Interactions

Antivirals and recreational drugs

A
21
Q

Language barriers

Overcome using an interpreter

A
  • Consultation time takes at least twice as long
  • Interpreter knowledge- do they know what HIV is
  • Correct interpretation
  • Patients concerned about confidentiality. Sometimes patients from small communities know the interpreter so get concerned about status disclosure
22
Q
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23
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24
Q

Medication factors

A
  • Taking too many pills/polypharmacy- may also be taking medication for TB, MAI or PCP (opportunistic infections)
  • Size of the pills- some often described by patients as horse pills or torpedoes
  • Reminder of being infected as everything else they do is normal
25
Q

Medication factors

A
26
Q

Disclosure

A
  • Links in with confidentiality
  • Patients do not want other people to know they attend an HIV clinic or take HIV medication as this gives away their status
  • Patients therefore hide medication from family and friends which can pose problems at home or at work
  • It is easy to google medication names to discover what they may be taken for
27
Q

Disclosure

A
28
Q
A
29
Q

Disclosure

A
  • Clinic policy- if you happen to meet a patient outside work (at a restaurant, cinema, walking down the street), do not engage with them unless they engage with you first
  • Patients can request they receive their HIV medication in a brown paper bag within the standard pharmacy carrier bag as this can be see-through
  • They can also request all outer packaging be removed when the meds are dispensed
  • Home delivery of medication- unmarked van and plain boxes containing the medication
30
Q

Stigma

A
  • This is the biggest problem with dealing with HIV
  • Links in with a lot of earlier points
  • Lack of education and lots of misinformation exists from the average person on the street to medical professionals
  • Highlighted by the movie Philadelphia and some others
  • Even exists between patients
31
Q

Stigma

Many people falsely believe

A
  • HIV and AIDS are always associated with death
  • HIV is associated with behaviours that some people disapprove of (homosexuality, drug use, sex work or infidelity)
  • HIV is only transmitted through unprotected sex
  • HIV infection is the result of personal irresponsibility or moral fault (infidelity) that deserves to be punished
32
Q

Solutions

A
  • Adherence clinic- a pharmacist-led multidisciplinary clinic where patients have more time with the relevant specialist
  • Blister packs Modified with symbols to highlight morning, evening etc .or with different languages
  • THT forum- a trusted online forum run by HIV patients for HIV patients
  • Mentoring- patients helping patients. Advice coming from someone in the same situation as you can be more beneficial than from a healthcare professional
  • Clinical hosts- Patients working in clinic but acting as an aid to newly diagnosed patients
  • Saturday socials- presentations to patients on different subjects by specialists run by support groups in clinic
  • Language line- interpreter using telephone. Prevents face to face contact as interpreter sits at home
  • Psychologist- currently oversubscribed, a very useful and undervalued resource
33
Q
A