[Da_Noob]

Try this

pawn Код:

public UseDrugs(playerid)
{
    KillTimer(UseDrugs1[playerid]);
    new float:health, float:newhealth = 5;
    GetPlayerHealth(playerid, health);
    SetPlayerHealth(playerid, health + newhealth);
    return 1;
}

I don't know if it'll work, give it a shot.