Who can take weight loss medications? Safety screening, eligibility criteria, and contraindications.

General Eligibility Requirements

BMI 28+: Most medications require BMI of 28 or higher.
Age 18+: Legal age requirement. Adolescents under 18 need specialist assessment.
Reasonable lifestyle attempt: Evidence of previous weight loss efforts (diet, exercise).
No contraindications: No conditions that make medication unsafe.

Orlistat Eligibility

Available: Most adults with BMI 28+.
Caution: Chronic pancreatitis, gallbladder disease, absorption disorders.
Safe with: Pregnancy (though not typically recommended), breastfeeding, most medications.
Drug interactions: None major, but separates fat-soluble vitamins.

GLP-1 Drug Eligibility (Wegovy, Mounjaro, Mysimba)

Available: Adults with BMI 30+ or 27+ with weight-related comorbidities.
Caution: History of thyroid cancer, multiple endocrine neoplasia (MEN2), pancreatitis, severe GI disease.
Diabetes users: Safe, often beneficial; improves blood sugar control.
Pregnancy: Discontinued 2 months before attempting conception.

Mysimba Specific Eligibility

Caution: Uncontrolled high blood pressure, seizure disorders, bipolar disorder.
Drug interactions: Some antidepressants, stimulants, opioids.
Monitoring: Regular blood pressure checks required.

Health Conditions That May Require Specialist Assessment

Type 2 Diabetes: GLP-1 drugs particularly beneficial; dose adjustment may be needed.
Thyroid Disease: Medical supervision recommended.
Mental Health Conditions: Mysimba requires careful assessment; some GLP-1s safe.
Kidney Disease: Dosing adjustments may apply.
Cardiovascular Disease: Often suitable, but cardiology input advised.

Safety Screening Process

1. Medical history review: Medications, allergies, past health issues.
2. Blood pressure check: Baseline and periodic monitoring.
3. Lifestyle assessment: Diet, exercise, stress, sleep.
4. Medication review: Interactions with current prescriptions.
5. Follow-up: Regular check-ins to monitor progress and side effects.

Contraindications: When Medications Are Not Safe

Absolute (do not use):
– History of medullary thyroid cancer
– MEN2 syndrome
– Active pancreatitis
– Pregnancy

Relative (caution, needs discussion):
– Severe GI disease
– Uncontrolled high blood pressure
– Bipolar disorder (Mysimba)
– Concurrent weight loss programs (stacking)

When to Seek Medical Advice First

Before starting: Consult GP if you have diabetes, thyroid disease, mental health condition, or take multiple medications.
During treatment: Report severe side effects, sudden mood changes, chest pain, or lack of progress after 3 months.
Long-term: Annual reviews recommended to assess continued suitability and adjust dosing.

Safety Expectations

Medication safety has improved significantly. All listed providers use licensed doctors, verified pharmacies, and MHRA-approved drugs.
Side effects are usually mild and manageable.
Serious adverse events are rare (less than 1% of users).
Professional supervision reduces risks substantially.

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