PHP does not display array data!

Friends, good night. In my code, I submit the following:

function cadastrar(){
    var t = 0;
    var nome = $$("#nome").val();
    var cpf = $$("#cpf").val();
    var tel = $$("#telefone").val();
    var end = $$("#endereco").val();
    var medic = $$("#lista_medicamentos .item-inner");
    var medicamentos = [];

    medic.each(function(idx, li){
        t++;
        var id_med = $$(li).find(".item-id-"+t+"");
        var nome_med = $$(li).find(".item-title-"+t+"");
        var qnt_med = $$(li).find(".item-after-"+t+"");

        medicamentos.push(id_med.html() +' - '+qnt_med.html()); //cria o array
    })

    var form_data = new FormData();
    form_data.append('paciente', nome);
    form_data.append('cpf', cpf);
    form_data.append('telefone', tel);
    form_data.append('endereco', end);
    form_data.append('medicamentos', JSON.stringify(medicamentos));

    $.ajax({
        url: 'cadastrarP.php',
        type: 'POST',
        data: form_data,
        cache: false,
        contentType: false,
        processData: false,
        success: function(response) {       
            console.log(response);
        },
        error: function(error) {
            alert(xhr.response);
        }
    }); 
return false;

}

In the console, the data is sent as follows: (Drug ID - output quantity)

Content-Disposition: form-data; name="medicamentos"

2 - 2,1 - 3

What I am trying to do is to get the ID of the medicine, and the amount of it dispensed, and register in the dispensing table. I tried to do a foreach, but it returns everything to me on a single line, without the comma: 2 - 21 - 3

<?php
header('Access-Control-Allow-Origin: *');
//header('Content-Type: application/json;charset=utf-8');

include 'init.php';

if(isset($_POST['paciente'])){

    $paciente = $_POST['paciente'];
    $cpf = $_POST['cpf'];
    $telefone = $_POST['telefone'];
    $endereco = $_POST['endereco'];
    $medicamentos = json_decode($_POST['medicamentos']);

    foreach($medicamentos as $val){
        echo $val;
    }
}

How would this foreach have to be done so that 2x appears in console.log?