Pharmacological Impact on Weight Management and Adherence Issues

Relation of Medications to Metabolic Complications

  • Increased Risk Factors: Relationship of medications to diabetes, hypertension, and metabolic complications.
    • Applies broadly to many medications, not just anti-epileptics.
    • Psychological impact of metabolic complications considered.

Antihistamines and Antihypertensives

  • Antihistamines:

    • Examples: Diphenhydramine (Benadryl), loratadine.
    • Associated with:
    • Increased appetite.
    • Weight gain due to:
      • Central effects on appetite regulation.
      • Sedation leading to reduced activity levels.

  • Antihypertensives:

    • Beta Blockers:
    • Primary antihypertensive associated with weight gain.
    • Causes:
      • Fatigue.
      • Decreased exercise tolerance.
      • Potential reduction in metabolic rate.
    • ACE Inhibitors and Calcium Channel Blockers:
    • Considered weight neutral.
    • Possible advantage for obese patients.

Antipsychotics and Weight Gain

  • Medication Adherence Issues:
    • Patients with mental health issues often struggle with adherence to medications.
    • Adverse reactions (e.g., weight gain) may lead to discontinuation of medications.
  • Medication Risk Spectrum:
    • Be aware of medications with the lowest to highest risk for weight gain and poor adherence.
    • Example: Risperidone associated with the highest risk for new onset diabetes and weight gain.

Statins and Weight Management

  • Statins: (Cholesterol-lowering agents)
    • Mechanism for weight gain not clearly understood.
  • Corticosteroids:
    • Long-term use linked to weight gain and central obesity.
    • Distinction between systemic steroids and inhaled steroids (the latter has different effects).

Proton Pump Inhibitors and Hormonal Contraceptives

  • Proton Pump Inhibitors (e.g., Omeprazole):
    • Associated with increased appetite and weight gain; mechanism unclear.
  • Hormonal Contraceptives:
    • Potential weight gain due to fluid retention and not fat gain.

Lithium and Weight Gain

  • Lithium: Mood stabilizer that may contribute to weight gain due to:
    • Increased thirst resulting in higher fluid intake (potentially high-calorie beverages).
    • Fluid retention and reduced metabolic rate.

Anorexients Overview

  • Definition: Medications that suppress appetite and may aid in weight loss.

  • Example: Phentermine (brand name: Adipex).

    • Mechanism of Action:
    • Stimulates release of norepinephrine and dopamine.
    • Inhibits norepinephrine and serotonin reuptake.
    • Central appetite suppression leading to weight loss.
    • Adverse Effects: High risk profile including:
    • Hypertension.
    • Insomnia.
    • Palpitations.
    • Potential for pulmonary hypertension.

  • Combination of Phentermine and Topiramate:

    • Topiramate increases central appetite suppression and alters taste/reward pathways.
    • Combination gains weight loss benefits with better tolerance over time.
    • Ongoing cardiovascular monitoring required due to stimulant properties and side effects.

Additional Anorexients

  • Diethylpropion:
    • Lower stimulant intensity and better tolerated than phentermine.
  • Benzfentamine and Fentimethrazidine:
    • Prodrugs with longer-lasting effects but greater stimulant activity.

Monitoring and Education Goals during Treatment

  • Monitoring Adverse Effects:
    • Cardiovascular issues, constipation, dry mouth.
    • Monitor blood pressure due to stimulating effects of medications.
  • Patient Education:
    • Emphasize that these medications are not solutions on their own; lifestyle changes are essential.
    • Encourage healthy weight loss of 1-2 pounds/week as a realistic goal.

Setting Realistic Goals for Weight Management

  • Objective Setting: Utilize SMART goals for patient engagement.

  • Non-scale Victories: Track other markers of progress:

    • Improved mood.
    • Increased energy levels.
    • Meeting activity guidelines.
    • Better fitting clothes.

  • Patient Perception: Regularly assess patient perceptions of progress and their confidence in achieving goals.

Conclusion

  • Evaluation of Patient Outcomes: Continuous assessment of weight management plans to ensure effectiveness and adherence. Monitor beyond just weight, including metrics like hemoglobin A1C and blood pressure.
  • Discussion Summary: Reinforce knowledge on diverse medications and their implications on lifestyle and adherence in patients with weight management issues, emphasizing both medical and lifestyle factors.