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A hiv pt which earlier pt had pnumococcus jivorecci now he has no symptomps except hiv
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Pneumocystis jirovecii prophylaxis HIV secondary prevention
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Excellent - I now have all the key information needed. Here is a thorough answer:
HIV Patient with Prior PCP - Now Asymptomatic
This is a classic question about secondary prophylaxis (preventing recurrence of Pneumocystis jirovecii pneumonia in an HIV patient).
What is Secondary Prophylaxis?
After a patient has had PCP, they are at very high risk of recurrence, so prophylaxis must be continued long-term. This is called secondary prophylaxis (as opposed to primary prophylaxis, which is given before a first episode).
When to Start
Secondary prophylaxis is started immediately after completing treatment for PCP (treatment is 21 days with TMP-SMX). Even if the patient is now asymptomatic, prophylaxis is mandatory.
Drug of Choice
| Drug | Dose | Notes |
|---|---|---|
| TMP-SMX (Co-trimoxazole) - 1st line | 1 DS tablet daily (or 1 SS daily) | Also protects against toxoplasmosis |
| Dapsone | 100 mg/day | If TMP-SMX intolerant |
| Dapsone + Pyrimethamine + Leucovorin | - | Alternative |
| Atovaquone | 1500 mg/day | Alternative |
| Aerosolized Pentamidine | 300 mg/month | Least preferred; no systemic protection |
TMP-SMX is strongly preferred - it has the broadest coverage and is most cost-effective.
When Can Secondary Prophylaxis be STOPPED?
Secondary prophylaxis can be safely discontinued when ALL of these are met (after starting ART/HAART):
- CD4+ count > 200 cells/μL for more than 3 months, AND
- Coincident decline in viral load (immune reconstitution confirmed)
"Discontinuation of secondary prophylaxis is recommended for PCP pneumonia after immune reconstitution with HAART once the CD4 cell count has been higher than 200 cells/μL for more than 3 months with a coincident decline in viral load."
- Swanson's Family Medicine Review
If the CD4 count later drops back below 200, prophylaxis must be restarted.
Summary for This Patient
Since the patient is now asymptomatic but still HIV-positive, the management is:
- Continue TMP-SMX secondary prophylaxis (1 DS tablet daily)
- Start/optimize ART (HAART) to achieve immune reconstitution
- Monitor CD4+ count - only stop prophylaxis once CD4 > 200/μL sustained for >3 months with undetectable/declining viral load
From: Harrison's Principles of Internal Medicine 22E - Goldman-Cecil Medicine (PCP chapter)
A recent 2024 network meta-analysis (PMID: 38583518) confirms TMP-SMX remains the most efficacious regimen for PCP prophylaxis in people living with HIV.
Till what days pt should have prophylaxis dose
Based on what we already retrieved from the textbooks, here is a direct answer:
Duration of PCP Secondary Prophylaxis in HIV
Short answer: Indefinitely, until immune reconstitution is confirmed
There is no fixed number of days. The prophylaxis continues lifelong UNLESS the patient meets the stopping criteria below.
Stopping Criteria (All must be met simultaneously)
| Criteria | Threshold |
|---|---|
| CD4+ T cell count | > 200 cells/µL |
| Duration of CD4 above 200 | More than 3 months |
| HIV viral load | Declining or undetectable (on ART/HAART) |
All three must be present at the same time before stopping.
What Happens After Stopping?
- If CD4 count drops back below 200/µL at any point → restart prophylaxis immediately
- Patient must remain on ART to maintain immune reconstitution
Practical Timeline Example
Day 0 → PCP diagnosed, start treatment (TMP-SMX)
Day 21 → PCP treatment completed
Day 22+ → Start secondary prophylaxis (TMP-SMX 1 DS tab daily)
+ Start ART if not already on it
Month 1-3+ → Monitor CD4 count monthly
When CD4 >200 for >3 consecutive months + viral load declining
→ Can consider STOPPING prophylaxis
Key Point for Exams
Secondary prophylaxis = until CD4 > 200/µL for > 3 months on ART
This is different from some other HIV-related infections (like cryptococcosis or CMV) where the stopping criteria differ. For example, coccidioidomycosis requires lifelong suppression with no safe discontinuation point, unlike PCP.
Source: Swanson's Family Medicine Review + Harrison's Principles of Internal Medicine 22E
To treat hiv what medicine are given
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Here is a complete breakdown of all HIV medicines:
Antiretroviral Therapy (ART) for HIV
The diagram below shows exactly where each drug class acts in the HIV lifecycle:
Drug Classes and Examples
1. NRTIs - Nucleoside/Nucleotide Reverse Transcriptase Inhibitors
Block reverse transcription of viral RNA to DNA
| Drug | Abbreviation |
|---|---|
| Zidovudine | ZDV / AZT |
| Lamivudine | 3TC |
| Emtricitabine | FTC |
| Tenofovir disoproxil fumarate | TDF |
| Tenofovir alafenamide | TAF |
| Abacavir | ABC |
| Stavudine | d4T (older, rarely used) |
| Didanosine | ddI (older) |
2. NNRTIs - Non-Nucleoside Reverse Transcriptase Inhibitors
Also block reverse transcriptase but at a different binding site
| Drug |
|---|
| Efavirenz |
| Nevirapine |
| Rilpivirine |
| Doravirine |
| Etravirine |
3. Integrase Strand Transfer Inhibitors (INSTIs) - Current 1st line
Block integration of viral DNA into the host chromosome
| Drug |
|---|
| Dolutegravir (DTG) - most preferred |
| Bictegravir (BIC) |
| Raltegravir |
| Elvitegravir |
| Cabotegravir |
4. Protease Inhibitors (PIs)
Block maturation of new virions
| Drug |
|---|
| Ritonavir (used as booster) |
| Darunavir |
| Atazanavir |
| Lopinavir |
5. Entry/Fusion Inhibitors
Block HIV from entering CD4 cells
| Drug | Mechanism |
|---|---|
| Maraviroc | CCR5 receptor antagonist |
| Enfuvirtide | Fusion inhibitor |
| Ibalizumab | CD4-directed post-attachment inhibitor |
| Fostemsavir | Attachment inhibitor (gp120) |
Preferred First-Line Regimen (Current Guidelines)
The standard of care is 2 NRTIs + 1 INSTI:
Dolutegravir + Tenofovir (TAF or TDF) + Emtricitabine (or Lamivudine)
This is often given as a single tablet once daily (e.g., Biktarvy = BIC/TAF/FTC).
- A 2-drug option (INSTI + NRTI) is also acceptable in patients without Hepatitis B co-infection.
Goal of Treatment
- Viral load < 50 copies/mL within 24 weeks of starting
- Treatment is lifelong - ART does not cure HIV but suppresses it
- ART is started in ALL HIV-positive patients regardless of CD4 count
Source: Goodman & Gilman's Pharmacological Basis of Therapeutics + Dermatology 2-Volume Set (HIV chapter)
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