Inflammatory Bowel Disease Drug Effects Flashcards
Where do the different IBD Drugs act
Sulfasalicyclates:
- Directly on Large/Small Bowel Lining
Corticosteroids
- On adrenal gland
Immunosuppressants
- On Large/Small bowel
Biologics:
- On Large/Small bowel
Aminosalicylates
- Efficacy
Onset 2-4 weeks
Response 4-8 weeks
Aminosalicylates
- Role
New diagnosis or mild symptoms
- Induction Therapy: Mild to Moderate UC>CD (Sulfasalazine only for CD)
- Maintenance Therapy: Remission UC (Sulfasalazine only for CD)
Aminosalicylates
- Dose for Induction vs Maintenance Therapy
Higher dose for Induction Therapy
Lower dose for Maintenance Therapy
Aminosalicylates
- MOA
Acts directly on lining of small and large bowel
Aminosalicylates
- Route
- Oral
- Rectal
Sulfasalazine
- Adverse Effects
Dose Related
- Nausea
- Dizziness
Non-Dose Related
- Hypersensitivity
- Slow acetylators have greater adverse effects
- Reduces Folate absorption (Supplementation needed in pregnancy)
5-ASA
- Adverse Effects
- Flatulence
- Abdominal pain
- Thrombocytopenia
- Olsalazine (Diarrhea)
Used when pt can not tolerate SSZ
Aminosalicylates
- Considerations
- For Chron’s disease only Sulfasalazine is usable
Aminosalicylates
- Choosing a Route
Use suppositories for distal disease
- Mezera
- Salofalk
- Pentasa
Corticosteroids
- MOA
Anti-inflammatory
Corticosteroids
- Routes
- Oral
- Rectal
- Injection
Corticosteroids
- Choosing a Route
In acute severe disease where oral prednisone has failed or if pt is hospitalized use injection formulation
- Once pt returns back to normal can switch back to oral
Corticosteroids
- Role
Anti-inflammatory used in moderate to severe relapses
- Induction Therapy: Moderate to Severe UC/CD
- Maintenance Therapy: No role
Corticosteroids
- Onset
Oral: Fast (Within 1-2 weeks)
Prednisone
- Considerations
- Take in the morning to avoid difficulty sleeping
- Taper 5 mg weekly or 5 mg every 2-3 days
Budesonide
- Considerations
Entocort
- Induction therapy for mild to moderate CD (For up to 3 months)
Cortiment
- Induction therapy for mild to moderate UC (Reassess 1-2 months
Prednisone vs Budesonide
Budesonide has less systemic AE
- Extensive first pass metabolism d
- Decreased systemic levels
Corticosteroids
- Adverse Effects
Short Term
- Increases infections
- Hyperglycemia
- Dyspepsia
- Acne
- Mood
Long Term
- HPA Axis Suppression
- Cushing’s
- Osteoporosis
HPA Axis Suppression
- Symptoms
- Difficulty sleeping
- Feeling cold
- Anxiety
- Depression
Immunosuppressants
- MOA
Decreases immune system response
Immunosuppressants
- Routes
- Oral
- Injection
Thiopurines
- Onset
2-6 months (Slow)
Thiopurines
- Role
Severe Symptoms or if Steroid Dependent
- Induction: Moderate to Severe (UC)
–> Have to be combined with steroids
- Maintenance: UC/CD
Thiopurines
- Adverse Effects
Dose-Related
- Nausea, diarrhea
- Bone marrow suppression
- Elevated liver enzymes
Non-Dose Related
- Hypersensitivity
- Sun Sensitivity
- Pancreatitis
- Hepatitis
Thiopurines
- Considerations
TPMT inactivates AZA/6-MP
- Poor TPMT metabolizers = Increased bone marrow suppression and adverse effects
Drugs that inhibit xanthine oxidase increases active metabolites
- Allopurinol, Febuxostat = Increases severe adverse effects
Thiopurines
- Contraindications
- Cancer
- Immunodeficiency
- Blood Disorders
- Liver Failure
- Pregnancy/Breastfeeding (However AZA is often used)
Methotrexate
- Dose
Given weekly
- Reduce dose by 50% if CrCl is 10-50 mL/min
- May avoid if CrCl is less than 30 mL/min
Methotrexate
- Onset
Onset 2-4 weeks
Symptomatic Response in 12-16 weeks
Methotrexate
- Role
Severe Symptoms or if Steroid Dependent
- Induction: Moderate to Severe (CD)
- Maintenance: CD
Only use in UC is to combine with biologics to reduce antidrug antibodies
Methotrexate
- Adverse Effects
Common:
- Nausea
- Fatigue, Malaise, Difficulty concentrating
Less Common
- Photosensitivity
- Hair Loss
Rare:
- Pneumonitis (Hypersensitivity)
- Cancer (Reversible Lymphoma)
Methotrexate
- Managing Adverse Effects
Nausea / Vomiting, ALT/AST Elevation, Low WBC/Platelets
- Folic Acid
Fatigue, Malaise, Difficulty Concentrating 24-48h after dose
- Dextromethorphan
Photosensitivity,
- Sunscreen
Hair Loss
- Folic Acid, Vit B12, Biotin, Collagen
Folic Acid
- MOA
Acts as a rescue agent for rapidly dividing cells
- Works against MTX inhibition of dihydrofolate reductase
Dextromethorphan
- MOA
Blocks neurostimulation of homocysteine at NMDA receptors in brain
- Preventing headaches, malaise, lethargy
Methotrexate
- Considerations
- Avoid binge drinking and drinking alcohol 24h after dose
- Avoid 3 months prior to conception
Methotrexate
- Drug Interactions
NSAIDs, Penicillins, PPIs (Considered safe to combine)
- Though may reduce renal excretion of MTX –> Hematological adverse effects
Trimethoprim (Avoid combined use)
- Both increases hematological adverse effects
- Decreases renal excretion of MTX –> Hematological adverse effects
Biologics
- MOA
Binds or blocks specific targets
TNFa Inhibitors
- Onset
Onset 2-4 weeks
Symptomatic Response 8-12 weeks
TNFa Inhibitors
- Role
Can combine with MTX or AZA
- Moderate to Severe (UC/CD) and not respondign to other therapy
Effective at healing fistulas
TNFa Inhibitors
- Continuing Therapy
If responding can continue TNFi for long term
- Increase dose
Can also switch to immunomodulatory therapy after achieving remission with TNFi
- Step-down therapy
Adalimumab
- Indication
UC and CD
Certolizumab
- Indication
UC
- Not covered
Golimumab
- Indication
UC
Infliximab
- Indication
UC and CD
TNFa Inhibitors
- Specific Adverse Effects
Acute Infusion Reactions
- Infliximab
Injection Side Reaction
-Adalimumab and Golimumab:
Delayed Hypersensitivity Reaction
- Infliximab
Acute Infusion Reaction
Within 10 mins, up to 4 hours
- Mild: Pain, itching, fever, chills, flush
- Severe: Hypotension, chest pain, dyspnea
Treatment:
- Premedicate with Cetirizine/Loratadine and Acetaminophen +/- Steroid
- Discontinue infusion
Injection Site Reaction
Occurs within 24-48h
- Common with 2nd and 3rd injection, then disappears
- Mild: Red, itchy, painful
Treatment:
- Treat with Cetirizine/Loratadine
- If long lasting use Montelukast
Delayed Hypersensitivity Reaction
Occurs 24h to 14d after repeated infliximab infusion
- Fever, hives, malaise, joint pain
Treatment:
- Antihistamine, acetaminophen x3 days
- Use steroid if needed
- Avoid further infliximab use
TNFa Inhibitors
- Adverse Effects
Common:
- Upper Respiratory Tract Infections, GI, aches
Uncommon:
- Lupus, skin conditions
Rare:
- Reactivation of infections (Test for TB and Hep B/C)
- Serious infections (Can be masked)
TNFa Inhibitors
- Contraindications
- Current infection
- Moderate to severe heart failure
- Demyelinating disorder (MS)
- Live attenuate vaccines (Mumps, measles, rubella)
- Other biologics / targeted therapy
Caution in:
- Family history of demyelinating disorders
- Lymphoma, skin cancer
Anti-Integrin Therapy
- MOA
Binds alpha4beta47 integrin on memory T lymphocytes of the gut
- Selectively inhibits adhesion to mucosal addressin cell adhesion molecule 1
Anti-Integrin Therapy
- Onset
UC: Symptomatic improvement 8-14 weeks
CD: Symptomatic improvement 10-15 weeks
Anti-Integrin Therapy
- Role
Can be combined with MTX or AZA
- Used in moderate to severe UC or CD where TNFi are not working
Anti-Integrin Therapy
- Adverse Effects
Similar to TNFi
- Upper Respiratory Tract Infections, GI, Aches
- Increase in bilirubin and liver enzymes
IL-12/23i
- MOA
Antagonist to p40 subunit shared by IL-12 and IL-23
IL-12/23i
- Onset
Symptomatic improvement 6-10 weeks
IL-12/23i
- Role
Can combine with MTX or AZA
- Moderate to Severe CD/UC when TNFi therapy has failed
IL-12/23i
- Adverse Effects
Similar to TNFi
- Upper Respiratory Infections, GI, Aches
IL-12/23i
- Contraindications
- Current infection
- Live vaccines
- Other biologic/targeted therapy
IL-23i (Mirikizumab)
- MOA
Binds p19 subunit of IL-23
IL-23i (Mirikizumab)
- Onset
Symptomatic response at 12 weeks
IL-23i (Mirikizumab)
- Role
Can be combined with MTX or AZA
- Used in moderate to severe UC when biologic or JAKi do not work
IL-23i (Mirikizumab)
- Adverse Effects
Similar to TNFi
- Upper respiratory infection, GI, Aches
IL-23i (Mirikizumab)
- Contraindications
- Current infection
- Live attenuated vaccine
- Other biologic/targeted therapy
IL-23i (Risankizumab)
- MOA
Selectively binds p10 subunit of IL-23
IL-23i (Risankizumab)
- Role
Can be combine with MTX or AZA
- Used in moderate to severe CD when biologics have failed and/or if steroid dependent
IL-23i (Risankizumab)
- Adverse Effects
Similar to TNFi
- Upper respiratory infection, GI, Aches
May cause liver enzyme elevation
JAK Inhibitors
- MOA
Inhibits JAK-induced pro-inflammatory cytokine production
JAK Inhibitors
- Role
Can be combined with MTX or AZA
- Used in moderate to severe UC/CD when biologics have failed
JAK Inhibitors
- Considerations
- Risk of GI perforation with history of diverticulitis
- Baricitinib can cause VTE, closely monitor for all JAKs
- CV risks and Cancer risks
- Contraindicated in pregnancy (D/C 6 weeks prior)
Tofacitinib vs Upadacitinib
Tofacitinib
- Moderate to Severe UC
- D/C if not responding by week 16
- AE: Diarrhea, Bradycardia
Upadacitinib
- Moderate to Severe UC/CD
- D/C if not responding
JAK Inhibitors
- Adverse Effects
Common:
- URTI, Headache
Less Common:
- Serious infections
- Decreased WBC and Hb
- Masks elevated cholesterol (Does not affect cholesterol itself though)
- ALT/AST elevations
SP-1 Receptor Agonist
- MOA
Activates Sphingosine 1-phosphate receptor modulator on lymphocyte
- Reduces lymphocyte release into intestine
SP-1 Receptor Agonist
- Onset
D/C if no benefit by week 10
SP-1 Receptor Agonist
- Role
Used in moderate to severe UC when biologic therapy has failed
SP-1 Receptor Agonist
- Adverse Effects
Similar to TNFi
- Upper respiratory infection, GI, Aches
- Decrease in Absolute Lymphocyte Count
- Serious infections
- Decrease Heart Rate
- Macular Edema
- Increase Liver Enzymes
SP-1 Receptor Agonist
- Contraindications
- Recent CV Event
- AV block
- Active infection
- Use of MAOi
Cyclosporine
- Onset
Rapid response within 1-2 weeks
Cyclosporine
- Role
Induction for acute severe UC refractory to corticosteroids
- Not used much in CD
Antibiotics
- Onset
Short 2-4 week courses (can be repeated)
Antibiotics
- Role
Used in CD with perianal or colonic involvement
OR
Used in CD with fistulas
Surgery
- Role
Used in:
- Strictures, abscesses
- Fistulae in CD
- Colectomy Curative in UC (Removal of diseased parts of colon)