Pulmonary hypertension (PH) is a life threatening condition. In PH, pulmonary arterial hypertension (PAH) and chronic thrombo-embolic chronic pulmonary hypertension (CTEPH) are two rare diseases requiring specific and complex drug management. In France ,a part of these treatments ,only available in hospital pharmacies, are generally unknown from community health care professionals despite the high risk of drug-interactions and side effects. Anticipating medication errors at the begging of the disease is therefore important, and could be done through medication reconciliation.

Medication reconciliation (MR) will be done for patients hospitalized in the French referral center for PH for PAH or CTEPH. Detected medication errors will be tracked and fixed by the physician before the end of hospitalization. A synthesis of new/stopped and modified treatments will be given to the patient as well as his related healthcare professionals (community pharmacist and general practioner) to ensure the maintaining of the new therapeutic management and the understanding of drugs modification. To compare the potential decrease of medication errors promoted by MR, a retrospective MR will be also done for patients without MR at 1st hospitalization but at the next one (3 to 12 months after).

Inclusion Criteria:

• Patient affiliated or entitled to a social security scheme
• At least 18 years old
• Patient with enlightened information of the study and not opposed with it.
• For patient without MR: patient hospitalized for the first re-evaluation of PAH or CTEPH within 12 months following the first assessment hospitalization (ie: first right heart catheterization at bicetre Hospital).
• For patient with MR: patient hospitalized for first assessment (first right heart catheterization at bicetre Hospital) of PAH or CTEPH

Exclusion Criteria:

• Patient suffering from another form of PH
• Patient under guardianship or curator
• Inability to give information to the patient either due to language barrier or to cognitive impairment
• Patient hosted in institution on discharge from hospital (follow-up care and long-term rehabilitation)
• Patient with a life expectancy of less than 1 year
• Patient on transplant list
• Patient refusal
• Length of stay < 48 hours

Patients hospitalized in the French referal center to confirm PAH or CETPH diagnosis or coming back after diagnosis hospitalization

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