HIV treatment

When to start

• Start in all viremic patients regardless of CD4 count and in all patients with declining CD4 regardless of viremia
• Start as soon as possible in patients with acute HIV, as it decreases the HIV reservoir
  • Less loss-to-follow-up, time-to-virologic-suppression decreased
  • Rapid linkage to care within 5 working days of diagnosis
• Do not stop treatment
• Unclear whether treatment needed for elite controllers
• Only delay treatment in cryptococcal meningitis

Starting Treatment

• Arrange their first clinic visit, and do the appropriate investigations
• Choose an appropriate single-tablet regimens, and start
  • Preference for regimen that includes integrase inhibitor
• Book follow-up

Antiretroviral therapy (ART) regimens

• Two nucleoside reverse-transcriptase inhibitors (NRTIs) and one non-NRTI (usually an integrase inhibitor)
• Preference for [HIV single-tablet regimens](Single-tablet regimens.md), which improve adherence

Special populations

Pregnancy

• Treat!
• NRTI backbone: abacavir/lamivudine, tenofovir/emtricitabine, or tenofovir/lamivudine
• 3rd agent
  • Protease inhibitor: ATV/r or DRV/r
  • Raltegravir
• Avoid dolutegravir, may cause neural tube defects when on it at the time of conception (but not if started during pregnancy)

Hepatitis B coinfection

• Prefer ART containing tenofovir, lamivudine or emtricitabine, and a third agent
  • Tenofovir/lamivudine + other
  • Tenofovir/emtricitabine + other

Hepatitis C coinfection

• Treat both concurrently, no need to delay
• Beware significant interactions with HCV medications

Tuberculosis

• Probably don't need to wait to treat
• Avoid TAF if using rifampin/rifamycin
• If using rifampin
  • EFV okay
  • RAL needs dose increase to 800 mg BID
  • DTG at 50 mg BID only without selected INSTI mutations
• If using PI, rifabutin can be used instead of rifampin

Cryptococcal meningitis

• Delay treatment for risk of IRIS

Switching regimens

• May be indicated to simplify regimens (single-pill), interactions, tolerability, comorbidities, pregnancy, or cost
• Goal is to maintain viral suppression to avoid resistance
• Consider:
  • Previous exposure to ART
  • Previous pattersn of resistance
  • Likelihood of adherence
  • Drug-drug and drug-food interactions
  • Comorbidities
• Can switch within- or between-class
  • Within-class
    • EFV to RPV
    • RAL to EVG or DTG
    • DTG to BIC
    • TDF or ABC to TAF
  • Between-class
    • Boosted PI to RPV
    • Boosted PI to EVG, DTG, or BIC
    • NNRTI to EVG or DTG
• TDF to TAF may see an increase in cholesterol

Side effects

• Kidney problems
• Metabolic complications
  • Osteoporosis
  • Dyslipidemia
  • Cardiovascular disease